JP7243242B2 - fabric - Google Patents

Description

TECHNICAL FIELD The present invention relates to a woven fabric having excellent waterproofness and low breathability.

As woven fabrics excellent in waterproofness, articles coated with resins such as polyurethane are widely used for sports clothes and the like. Furthermore, the number of cases where materials having such functionality are also used in the field of casual fashion is increasing.

However, although woven fabrics such as resin-coated products are extremely excellent in low air permeability and waterproofness, they have the drawback of poor softness. For this reason, there is a high demand for non-coated fabrics that have a soft touch and yet have high waterproofness and low breathability.

In order to meet such demands, various studies have been made such as reducing the single yarn fineness of the constituent fiber threads and weaving at high density.

For example, Patent Document 1 discloses a high-density woven fabric using polyester continuous fiber yarns having a single yarn fineness of 0.6 denier or less and a total fineness of 60 to 120 denier. Composed of crimped yarn, the total fineness of the warp yarn, the total fineness of the weft yarn and the warp yarn cover factor satisfy a predetermined relational expression, resulting in a non-coating type thin fabric with high waterproof performance and soft touch. A technique has been disclosed that can provide a high-density woven fabric made of polyester filament yarns that has practically no problem level of tear strength and has excellent tailoring after sewing.

JP-A-10-245741.

However, although the high-density woven fabric described in Patent Document 1 can achieve a certain level of water pressure resistance, ordinary plain woven fabrics do not have a woven structure with sufficiently small gaps between crossing points, so low air permeability is inadequate. was enough.

SUMMARY OF THE INVENTION An object of the present invention is to solve the problems of the prior art and to provide a woven fabric excellent in waterproofness and low breathability.

In order to solve such problems, the present invention has the following configurations.

(1) A fabric woven by interlacing yarns in the warp and weft, in which the yarns YA and YB arranged in the same direction have different crimp ratios A and B, respectively, and the crimp ratio B is less than 4%. A woven fabric having a crimp ratio A that satisfies the relationship of 15≦A≦500.

(2) The woven fabric according to (1), wherein the yarn fineness D (dtex) of the yarn to be interwoven with the yarn having the crimp rate B and the distance L (μm) between the upper end and the lower end of the yarn in the thickness direction satisfy the following formula 1.
L/√D≧15 (Formula 1)

(3) The fabric according to any one of (1) to (2), wherein the weaving yarn YA with the crimp ratio A and the weaving yarn YB with the crimp ratio B are arranged at a ratio of 1:1.

(4) The woven fabric according to any one of (1) to (3), which has a cover factor of 2400 or more.

(5) The woven fabric according to any one of (1) to (4), which has an air permeability of 1.0 cm ³ /cm ² ·sec or less.

(6) The woven fabric according to any one of (1) to (5), which has a water pressure resistance of 4.9 kPa (500 mmH ₂ O) or more.

(7) The woven fabric according to any one of (1) to (6), at least one side of which is calendered.

(8) The woven fabric according to any one of (1) to (7), at least one side of which is water-repellent.

(9) The woven fabric according to any one of (1) to (8), wherein the yarns YA and YB arranged in the same direction are woven under different tensions during weaving.

(10) The woven fabric according to any one of (1) to (9), which is woven in a plain weave or ripstop weave.

ADVANTAGE OF THE INVENTION According to this invention, the textile fabric excellent in waterproofness and low breathability can be provided.

FIG. 1 is a surface SEM photograph of the plain weave fabric obtained in Example 3. FIG. FIG. 2 is a SEM photograph of a cross section of the weft when cut along the cutting line α in the warp direction of the crimp rate A in FIG. FIG. 3 is a SEM photograph of a cross section of the weft when cut along the cutting line β in the warp direction of the crimp rate B of FIG. 1 .

The plain woven fabric according to the present invention is a woven fabric woven by interlacing yarns in the warp and weft, wherein the yarns YA and YB arranged in the same direction have different crimp ratios A and B, respectively. The woven fabric is characterized by having a ratio B of less than 4% and a crimp ratio A satisfying the relationship of 15≦A≦500.

Note that the above-mentioned "the weaving yarns arranged in the same direction have different crimp ratios" means that when a certain weaving yarn arranged in the warp direction and/or the weft direction has a certain crimp ratio, at least It means that at least one type of weaving yarn having a crimp rate different from the crimp rate is arranged in the same direction as the weaving thread. Among the two or more crimp ratios, the maximum crimp ratio A and the minimum crimp ratio B are used. The weaving yarn having the crimp rate B” is referred to as “weaving yarn YB”.

The crimp rate B is preferably less than 4%, more preferably 2% or less. The lower limit is preferably 0.1% or more.

Also, the crimp ratio A is preferably 15% or more, more preferably 50% or more. The upper limit is preferably 500% or less.

By setting the relationship between the crimp ratios A and B within the above range, it is possible to obtain a woven fabric with an extremely high density.

In addition, L/√D is preferably 15 or more, more preferably 20 or more, when the yarn fineness D (dtex) of the yarn to be interwoven with the yarn of the crimp ratio B and the distance L (μm) between the upper end and the lower end of the yarn in the thickness direction. is more preferred. By setting L/√D to the above value, the surface becomes more uneven, and more air is caught between water droplets and the fabric, resulting in a fabric with high water repellency.

In the above, "yarn to be interwoven with the yarn of crimp rate B" means the weft thread if the thread of crimp rate B is the warp thread, and the warp thread if the thread of crimp rate B is the weft thread. "Yarn fineness D" refers to the fineness of the weaving yarn. The yarn fineness referred to here is the yarn fineness of the yarn collected by decomposing the fabric.

"The distance L between the upper end and the lower end of the yarn in the thickness direction" is two crimp ratios arranged so as to sandwich the yarn with the crimp ratio B above and below in the cross section of the fabric cut along the yarn with the crimp ratio B. It means the vertical distance between the upper vertex tangent of the upper yarn section and the lower vertex tangent of the lower yarn section for the yarn interlaced with the B yarn.

The above will be described with reference to FIGS. 1 and 3 as an example.

FIG. 1 is a surface SEM photograph of a plain weave fabric obtained in Example 3 described later, and FIG. 3 is a SEM of a cross section of the weft when cut along the cutting line β in the warp direction of the crimp ratio B in FIG. It is a photograph. In the cross section of the fabric cut along the warp yarns 4 with the crimp ratio B shown in FIG. , the vertical distance L is the distance between the upper vertex tangent line 5 of the upper thread section and the lower vertex tangent line 6 of the lower thread section.

In the woven fabric, it is preferable that the weaving yarn YA with the crimp ratio A and the weaving yarn YB with the crimp ratio B are arranged at a ratio of 1:1.

The "proportion" of the weaving yarn with the crimp ratio A and the weaving yarn with the crimp ratio B means the number ratio of the weaving yarns. The number of weaving yarns is counted as one unit in which the warp or weft intersects with the weft or warp. "The weaving yarns YA and the weaving yarns YB having the crimp rate B are arranged at a ratio of 1:1" means that the same number of the weaving yarns YA and the weaving yarns YB are alternately arranged.

Among them, it is preferable that the weaving yarn with the crimp ratio A and the weaving yarn with the crimp ratio B are arranged alternately one or two.

Incidentally, the meaning of "1:1" here may be slightly shifted when n weaving yarns YA are alternately arranged on both ends as described above, but generally 1:1 is sufficient. .

With the above configuration, the woven fabric can be strong and excellent in dimensional stability.

In addition, since the weaving yarns YA and YB arranged in the same direction have different crimp ratios A and B, it is possible to obtain a high-density fabric that has not been obtained conventionally.

The cover factor of the woven fabric of the present invention is preferably 2400 or higher, more preferably 2500 or higher, and more preferably 2600 or higher. As an upper limit, it is preferable that it is 4000 or less.

The cover factor (Cf) is obtained by the following formula.
Cf=N _W ×(D _W ) ^1/2 +N _F ×(D _F ) ^1/2
N _W : warp weave density (number/2.54 cm)
N _F : weft weave density (thread/2.54 cm)
_DW : warp total fineness (dtex)
_DF : total weft fineness (dtex)

By setting the cover factor in the above range, a lightweight and thin fabric having low air permeability can be obtained. If the cover factor of the woven fabric is less than 2400, a thin and light woven fabric can be obtained, but it is difficult for the uncoated type to satisfy low air permeability. On the other hand, if it exceeds 4000, the woven fabric tends to be heavy although the low air permeability is satisfied.

In a preferred embodiment of the present invention, it is possible to achieve an air permeability of 1.0 cm ³ /cm ² ·sec or less, more preferably 0.5 cm ³ /cm ² ·sec or less, and more preferably It is also possible to achieve 0.2 cm ³ /cm ² ·sec or less. The lower limit is practically about 0.01 cm ³ /cm ² ·sec or more.

By setting the air permeability within the above range, for example, when a down jacket is used, it is possible to suppress the insulation or down from falling out, and the outer garment or the like can have excellent windproof properties and can block outside air.

In a preferred embodiment of the present invention, it is also possible to achieve a water pressure resistance of 4.9 kPa (500 mmH ₂ O) or more, a more preferred embodiment of 9.8 kPa (1000 mmH ₂ O) or more, and a more preferred embodiment of 14. It is also possible to achieve 7 kPa (1500 mmH ₂ O) or more. The upper limit is usually preferably 68.6 kPa (7000 mmH ₂ O) or less.

By setting the water pressure resistance within the above range, a woven fabric that is impermeable to water can be obtained. If it is less than 4.9 kPa (500 mmH ₂ O), for example, in the case of a windbreaker, the water resistance against wind and rain is lowered, and the rain easily penetrates into the clothes. However, in order to exceed 68.6 kPa (7000 mmH ₂ O), it may be necessary to apply a film processing such as polyurethane resin, and if a large amount of resin is required for film processing, the lightness may be impaired. be.

Preferably, the fabrics of the present invention are constructed from multifilament yarns. Examples of fibers that form the multifilament yarn include polyamide fibers, polyester fibers, aramid fibers, rayon fibers, polysulfone fibers, ultra-high molecular weight polyethylene fibers, and polyolefin fibers. Among them, polyamide-based fibers and polyester-based fibers, which are excellent in mass productivity and economic efficiency, are preferable.

Examples of polyamide fibers include nylon 6, nylon 66, nylon 12, nylon 46, copolymerized polyamide of nylon 6 and nylon 66, copolymerized nylon 6 with polyalkylene glycol, dicarboxylic acid, amine, etc. Fibers made of polyamide or the like can be mentioned. Nylon 6 fibers and nylon 66 fibers are particularly excellent in impact resistance and are preferable.

Examples of polyester fibers include fibers made of polyethylene terephthalate, polybutylene terephthalate, and the like. Fibers made of copolymer polyester obtained by copolymerizing polyethylene terephthalate or polybutylene terephthalate with isophthalic acid, 5-sodium sulfoisophthalic acid, or an aliphatic dicarboxylic acid such as adipic acid as an acid component may also be used.

The fibers that make up the multifilament yarn also preferably contain heat stabilizers, antioxidants, light stabilizers, leveling agents, antistatic agents, plasticizers, thickeners, pigments, flame retardants, and the like.

The materials of the warp and weft may be the same or different, but it is preferable to use the same material in consideration of post-processing and dyeing.

The multifilament yarn preferably used in the woven fabric of the present invention preferably has a total fineness of 22 to 220 dtex, preferably 33 to 167 dtex. By setting the total fineness of the multifilament yarn within the above range, it is easy to obtain a practically sufficient strength as a thin fabric, and it is easy to obtain a light fabric.

The single fiber fineness of the multifilament yarn is preferably 0.01 dtex to 6 dtex, more preferably 0.02 dtex to 0.5 dtex, from the viewpoint of fabric flexibility. Moreover, the multifilament yarn constituting the woven fabric may be a multifilament yarn obtained by direct spinning, or a so-called ultrafine fiber obtained by removing the sea from the sea-island composite fiber.

The woven fabric of the present invention can be produced, for example, as follows.

As a method for imparting a difference in crimp rate to yarns arranged in the same direction, there is a method of weaving yarns YA and YB arranged in the same direction with different tensions during weaving.

For example, the following methods are mentioned.

When the weaving yarns YA and YB are warp yarns, the warp yarns to be controlled to have a crimp ratio B (hereinafter sometimes referred to as "warp yarns with a crimp ratio B") are increased in tension and the crimp ratio A is increased during weaving. It is preferable that the warp to be woven (hereinafter sometimes referred to as "warp with crimp ratio A") is woven with a low tension within a range that does not interfere with shedding. For example, it is preferable to set the tension of the thread A1×2.5=the tension of the thread B1. When it is desired to increase the crimp rate A with respect to the crimp rate B, the warp tension at the crimp rate A may be decreased with respect to the warp tension at the crimp rate B, and the desired crimp rates A and B are appropriately adjusted. . Specifically, it is preferable that the warp tension at the crimp rate B≧the warp tension at the crimp rate A×2.5, as long as the strength of the original yarn is within a range where there is no problem.

Generally, in a high-density woven fabric, if the warp tension is lowered during weaving in order to increase the warp crimp rate, it is difficult to increase the weft density due to bumping (weft return). However, according to the above-described embodiment, the weft can be restrained by the warp having the crimp rate A with the warp having the crimp rate B as a fulcrum, and bumping can be suppressed. Therefore, the crimp rate of the warp with the crimp rate A can be increased.

Specific methods for adjusting the warp tension within the above range include adjusting the warp delivery speed of the loom and adjusting the weft driving speed. To check whether the warp tension is actually within the above range during weaving, for example, during operation of the loom, measure the tension applied to each warp between the warp beam and the back roller with a tension measuring instrument. can be done.

Further, when the weaving yarns YA and YB are weft yarns, the tension when the weft yarns are inserted between the warp sheds may be adjusted.

The weave structure of the fabric is a plain weave. , As an applied structure, it is possible to use a vertical expansion structure in which several wefts are inserted in the same opening, a horizontal expansion structure in which several adjacent warps are arranged in the same opening, or a fabric in which several warp yarns are arranged in the same opening like basket weaving. A ripstop structure is also applied to improve tenacity.

Also, the loom used for manufacturing the woven fabric is not particularly limited, and a water jet loom, an air jet loom, or a rapier loom can be used.

The woven fabric may be scoured, relaxed, preset, dyed and finished using conventional processing machinery.

It is preferable that at least one side of the woven fabric is calendered in order to achieve high water pressure resistance. The calendering process may be applied to one side of the fabric or both sides, but when using it for outerwear, for example, if the uneven structure on the surface is crushed, the water repellency will decrease, so it is better to calender only one side. preferable. In particular, it is preferred that the back surface is calendered and the front surface is not calendered, or if calendered, it is limited to the extent that the desired water repellency can be maintained. As a result, it is possible to provide a high level of characteristics such as high water repellency on the surface due to the uneven structure and high water pressure resistance on the back surface. In the above, the number of times of calendering is not particularly limited.

The calendering temperature is not particularly limited, but it is preferably 80° C. or more higher than the glass transition temperature of the material used, more preferably 120° C. or more, and preferably 20° C. or more lower than the melting point of the material used, and 30° C. or more. Lower is more preferred. By setting the calendering temperature within the above range, a woven fabric can be obtained which can maintain both low air permeability and high tear strength. On the other hand, when the calendering temperature is equal to or higher than the glass transition temperature of the raw material used plus 80° C., an appropriate degree of compression can be obtained, and a waterproof woven fabric can be obtained. In addition, since the melting point of the material used is -20°C or lower, an appropriate degree of compression can be obtained, and the tear strength of the fabric is excellent.

For example, when polyamide is used as the raw material, the calendering temperature is preferably 120°C to 200°C, more preferably 130°C to 190°C. When polyester is used as the material, the temperature for calendering is preferably 160°C to 240°C.

The calendering pressure is preferably 0.98 MPa (10 kgf/cm ² ) or more, more preferably 1.96 MPa (20 kgf/cm ² ) or more, and 5.88 MPa (60 kgf/cm ² ) or less. It is preferably 4.90 MPa (50 kgf/cm ² ) or less. By setting the calendering pressure within the above range, a woven fabric can be obtained which can maintain both low air permeability and tear strength. On the other hand, when the calendering pressure is 0.98 MPa (10 kgf/cm ² ) or more, an appropriate degree of compression can be obtained, and a woven fabric having excellent waterproofness can be obtained. In addition, by setting it to 5.88 MPa (60 kgf/cm ² ) or less, the fabric is moderately compressed and has excellent tear strength.

The material of the calender rolls is not particularly limited, but one of the rolls is preferably made of metal. The metal roll can control its own temperature and evenly compress the dough surface. Although the other roll is not particularly limited, it is preferably made of metal or resin, and if it is made of resin, it is preferably made of nylon.

At least one side of the woven fabric is preferably treated with a water-repellent finish, and may be subjected to various functional treatments and a soft finish for adjusting the texture and strength of the woven fabric. By applying a water-repellent finish to the fabric having the above-described preferred range of L/√D, it is possible to obtain a fabric having a water repellency of grade 3 or higher even after 20 washes.

As the water repellent agent, a general water repellent agent for textiles may be used. For example, a silicone water repellent agent, a fluorine-based water repellent agent composed of a polymer having a perfluoroalkyl group, and a paraffin-based water repellent agent are preferably used. . Among them, the use of a fluorine-based water repellent is particularly preferable because the refractive index of the film can be kept low and the reflection of light on the fiber surface can be reduced. Common methods such as padding, spraying, printing, coating, and gravure can be used for water-repellent finishing.

As the softener, amino-modified silicone, polyethylene-based, polyester-based, paraffin-based softeners, and the like can be used.

The woven fabric obtained in this way is a woven fabric with excellent waterproofness and low breathability, and when subjected to water repellent treatment, it becomes a woven fabric with excellent water repellency, so one of these characteristics is Taking advantage of the above, it can be usefully used for down wear, down jackets, sports clothing, futons, sleeping bags, umbrella fabrics, medical base materials, and the like.

Examples of the present invention will be described below together with comparative examples.

Methods for measuring various properties used in the present examples are as follows.

(1) Total fineness and number of filaments The total fineness was measured based on JIS L 1013:2010 8.3.1 (A method) (regular fineness).

The number of filaments was measured based on JIS L 1013:2010 8.4.

(2) Weave density Weave density was measured based on JIS L 1096:2010 8.6.1.

Place the sample on a flat table, remove unnatural wrinkles and tension, count the number of warp and weft threads between 0.5 cm for 5 different places, calculate the average value of each, and calculate the average value per 2.54 cm converted to the number of

(3) Crimp rate The crimp rate was measured based on JIS L 1096:2010 8.7 (B method).

Place the sample on a flat table, remove unnatural wrinkles and tension, and mark a distance of 200 mm for three different places where yarns A1 and B1 with different crimp rates are arranged adjacent to each other. Untie the thread in the mark to make it a disassembled thread, measure the length stretched straight under the initial load specified in 5.1 of JIS L 1013:2010, calculate the average value, and calculate the change length bottom.

(4) Cover factor The cover factor (Cf) was determined by the following formula.
Cf=N _W ×(D _W ) ^1/2 +N _F ×(D _F ) ^1/2
N _W : warp weave density (number/2.54 cm)
N _F : weft weave density (thread/2.54 cm)
_DW : warp total fineness (dtex)
_DF : total weft fineness (dtex)

(5) Air permeability The air permeability is determined according to JIS L 1096:2010 8.26.1. (A method) Measured based on the (Frazier method).

(6) Water pressure resistance Water pressure resistance was measured based on JIS L 1092:2009 7.1.1 (A method) (low water pressure method). For single-sided calendered fabrics, the non-calendered side was measured as the front side.

(7) Water repellency After washing 20 times based on JIS L 1092: 2009 6.2.1 (C method) (method using a household electric washing machine), the same 7.2 water repellency test (spray test).

(8) Distance L between upper end and lower end of thread in thickness direction
Cut the sample along the yarn with the crimp rate B, and observe the cross section at 100 times using a scanning electron microscope (SEM) (manufactured by Hitachi High-Technologies Corporation). The vertical distance L between the upper vertex tangent of the upper yarn cross section and the lower vertex tangent of the lower yarn cross section was measured for the yarn interwoven with the two yarns having the crimp rate B arranged so as to be sandwiched between them.

(9) Yarn fineness D of decomposed yarn
The yarn collected by decomposing from the fabric so as not to damage the yarn constituting the fabric is accurately cut to a length of 9 cm under the initial load described in JIS L 1013: 2010 5.1, and the mass is electronically Measured with a balance (manufactured by Mettler Toledo, Inc.), the yarn fineness D (dtex) was obtained from the following formula, and the average value of five yarns was calculated.
D=m/l×10000
D: Yarn fineness of decomposed yarn (dtex)
m: Mass of sample (g)
l: sample length (m)

[Example 1]
A polyethylene terephthalate fiber of 84 dtex, 144 filaments as the raw yarn of the weaving yarn (A1) with a crimp ratio A, and a polyethylene terephthalate fiber of 84 dtex, 144 filaments as the raw yarn of the weaving yarn (B1) with a crimp ratio B. Used for warp. A polyethylene terephthalate fiber of 84 dtex and 144 filaments was used as the raw yarn for the weft.

Then, during weaving, the tension ratio between the yarn A1 and the yarn B1 is set to 2.5 times, the warp density is set to 169/2.54 cm, and the weft density is set to 170/2.54 cm. A plain weave fabric was obtained by weaving with a plain weave structure in which the strands were crossed one by one. The resulting plain weave fabric is scoured using an open soap, preset at 185° C. for 30 sec using a pin tenter, and a padder is used to apply a fluorine-based resin compound by a pad cure method to perform water repellent treatment. It was dried at 130°C for 1 min and intermediate set at 180°C for 30 sec. After that, calendering (processing conditions: cylinder processing, temperature 170°C, pressure 2.45 MPa (25 kgf/cm ² , speed 20 m/min) is performed twice on one side of the fabric, and the warp density is 190 / 2.54 cm. A plain weave having a weft density of 168/2.54 cm and a cover factor of 3281 was obtained, and the air permeability and water pressure resistance of the obtained plain weave were evaluated by the methods described above.

Table 1 shows the properties of the obtained plain weave fabric.

[Example 2]
As the crimp ratio A yarn (A1) and the crimp ratio B yarn (B1), 22 dtex, 20 filament nylon fibers were used as warp yarns. A 28 dtex, 48 filament polyamide fiber was used for the weft.

Then, during weaving, the yarn A1 and the yarn B1 are alternately arranged at a ratio of 1:1 (number ratio), and the warp density is 290 / 2 as the tension of the yarn A1 × 2.5 = yarn B1. 0.54 cm, the weft density was set to 190/2.54 cm, and one warp and one weft were interlaced in a plain weave structure to obtain a plain weave. The resulting plain weave fabric is scoured using an open soap, preset at 185° C. for 30 sec using a pin tenter, and a padder is used to apply a fluorine-based resin compound by a pad cure method to perform water repellent treatment. It was dried at 130°C for 1 min and intermediate set at 180°C for 30 sec. After that, calendering (processing conditions: cylinder processing, temperature 170°C, pressure 2.45 MPa (25 kgf/cm ² , speed 20 m/min) was performed twice on one side of the fabric, and the warp density was 324 / 2.54 cm. A plain weave having a weft density of 210/2.54 cm and a cover factor of 2631 was obtained, and the air permeability and water pressure resistance of the obtained plain weave were evaluated by the methods described above.

Table 1 shows the properties of the obtained plain weave fabric.

[Example 3]
As the crimp ratio A yarn (A1) and the crimp ratio B yarn (B1), polyethylene terephthalate fibers of 56 dtex and 144 filaments were used as warps. In addition, the same yarn was used for the weft yarn.

Then, during weaving, the yarn A1 and the yarn B1 are alternately arranged at a ratio of 1:1 (number ratio), and the tension of the yarn A1 × 2.5 = the tension of the yarn B1, and the warp density is 200. /2.54 cm, the weft density was set to 200/2.54 cm, and the warp and the weft were interlaced one by one to obtain a plain weave. The resulting plain weave fabric is scoured using an open soap, preset at 185° C. for 30 sec using a pin tenter, and a padder is used to apply a fluorine-based resin compound by a pad cure method to perform water repellent treatment. It was dried at 130°C for 1 min and intermediate set at 180°C for 30 sec. After that, calendering (processing conditions: cylinder processing, temperature 170°C, pressure 2.45 MPa (25 kgf/cm ² , speed 20 m/min) was performed twice on one side of the fabric, and the warp density was 220 / 2.54 cm. A plain weave having a weft density of 222/2.54 cm and a cover factor of 3308 was obtained.The air permeability and water pressure resistance of the obtained plain weave were evaluated by the methods described above.

The properties of the obtained plain weave are shown in Table 1 and FIGS. 1 is a SEM photograph of the surface of the obtained plain weave fabric, FIG. FIG. 3 shows a SEM photograph of a cross section of the weft when cut along the cutting line β in the warp direction of the rate B. As shown in FIG.

FIG. 2 shows that in the plain weave 1, the warp yarns 2 with a crimp ratio A cover the surface of the weft yarns 3 from the left and right to form a dense structure, and FIG. 3 is pushed up in the thickness direction to develop an uneven structure.

[Example 4]
A polyethylene terephthalate fiber of 84 dtex, 144 filaments as the raw yarn of the weaving yarn (A1) with a crimp ratio A, and a polyethylene terephthalate fiber of 84 dtex, 144 filaments as the raw yarn of the weaving yarn (B1) with a crimp ratio B. Used for warp. A polyethylene terephthalate fiber of 84 dtex and 144 filaments was used as the raw yarn for the weft.

Then, during weaving, the yarn A1 and the yarn B1 are alternately arranged at a ratio of 1:1 (number ratio), and the tension of the yarn A1 × 5.5 = the tension of the yarn B1, and the warp density is 154. 2.54 cm, and the weft density was set to 250/2.54 cm, and the warp and the weft were interlaced one by one to obtain a plain weave. The resulting plain weave fabric is scoured using an open soap, preset at 185° C. for 30 sec using a pin tenter, and a padder is used to apply a fluorine-based resin compound by a pad cure method to perform water repellent treatment. It was dried at 130°C for 1 min and intermediate set at 180°C for 30 sec. After that, calendering (processing conditions: cylinder processing, temperature 170°C, pressure 2.45 MPa (25 kgf/cm ² , speed 20 m/min) was performed twice on one side of the fabric, and the warp density was 166 / 2.54 cm. A plain weave having a weft density of 266/2.54 cm and a cover factor of 3959 was obtained, and the air permeability and water pressure resistance of the obtained plain weave were evaluated by the methods described above.

Table 1 shows the properties of the obtained plain weave fabric.

[Comparative Example 1]
A 56 dtex, 36 filament polyethylene terephthalate fiber was used for the warp and weft.

Then, during weaving, the warp density was set to 146/2.54 cm and the weft density was set to 92/2.54 cm without arbitrarily applying a tension difference to the warp, and the warp and the weft were crossed one by one. A plain weave fabric was obtained by weaving in a plain weave structure. The resulting plain weave fabric is scoured using an open soap, preset at 185° C. for 30 sec using a pin tenter, and a padder is used to apply a fluorine-based resin compound by a pad cure method to perform water repellent treatment. It was dried at 130°C for 1 min and intermediate set at 180°C for 30 sec. After that, calendering (processing conditions: cylinder processing, temperature 170°C, pressure 2.45 MPa (25 kgf/cm ² , speed 20 m/min) is performed twice on one side of the fabric, and the warp density is 152 / 2.54 cm. A plain weave having a weft density of 96/2.54 cm and a cover factor of 1856 was obtained, and the air permeability and water pressure resistance of the obtained plain weave were evaluated by the methods described above.

Table 1 shows the properties of the obtained plain weave fabric.

[Comparative Example 2]
A polyethylene terephthalate fiber of 56 dtex, 36 filaments as the raw yarn of the weaving yarn (A1) with a crimp ratio A, and a polyethylene terephthalate fiber of 56 dtex, 36 filaments as the raw yarn of the weaving yarn (B1) with a crimp ratio B. Used for warp. A polyethylene terephthalate fiber of 167 dtex and 144 filaments was used as the raw yarn for the weft. Then, during weaving, the yarn A1 and the yarn B1 are alternately arranged at a ratio of 1:1 (number ratio), and the tension of the yarn A1 × 1.2 = the tension of the yarn B1, and the warp density is 146. /2.54 cm, and the weft density was set to 84 yarns/2.54 cm. The resulting plain weave fabric is scoured using an open soap, preset at 185° C. for 30 sec using a pin tenter, and a padder is used to apply a fluorine-based resin compound by a pad cure method to perform water repellent treatment. It was dried at 130°C for 1 min and intermediate set at 180°C for 30 sec. After that, calendering (processing conditions: cylinder processing, temperature 170°C, pressure 2.45 MPa (25 kgf/cm ² , speed 20 m/min) is performed twice on one side of the fabric, and the warp density is 152 / 2.54 cm. A plain weave having a weft density of 89/2.54 cm and a cover factor of 2287 was obtained, and the air permeability and water pressure resistance of the obtained plain weave were evaluated by the methods described above.

Table 1 shows the properties of the obtained plain weave fabric.

1. Plain weave2. Warp yarns with crimp rate A3. weft 4 . Warp yarns with crimp ratio B5. Top vertex tangent of top thread section6. Bottom vertex tangent α. Cutting line β in the warp direction of crimp ratio A. Cutting line in the warp direction of crimp rate B

Claims (8)

It is a fabric woven with a plain weave or a ripstop weave by crossing the weaving yarns in the warp and weft, and the weaving yarns YA and YB arranged in the same direction have different crimp ratios A and B, respectively, and the crimp ratio B is A woven fabric having a crimp ratio A of less than 4%, satisfying the relationship of 15≦A≦500, and having a cover factor of 2400 or more . 2. The fabric according to claim 1, wherein the yarn fineness D (dtex) of the yarn interwoven with the yarn of the crimp rate B and the distance L (μm) between the upper end and the lower end of the yarn in the thickness direction satisfy the relationship of the following formula 1 .
L/√D≧15 (Formula 1) The fabric according to any one of claims 1 and 2, wherein the weaving yarn YA with the crimp ratio A and the weaving yarn YB with the crimp ratio B are arranged at a ratio of 1:1. The fabric according to any one of claims 1 to 3 , which has an air permeability of 1.0 cm ³ /cm ² ·sec or less. The fabric according to any one of claims 1 to 4 , which has a water pressure resistance of 4.9 kPa (500 mmH ₂ O) or more. The woven fabric according to any one of claims 1 to 5 , wherein at least one side of the fabric is calendered. The fabric according to any one of claims 1 to 6 , wherein at least one side of the fabric is water-repellent. The fabric according to any one of claims 1 to 7 , wherein the yarns YA and YB arranged in the same direction are woven under different tensions during weaving.

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