JP3829591B2 - Polyester water repellent fabric - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a polyester-based water-repellent woven fabric having stretchability that is comfortable to wear and excellent in water repellency.
[0002]
[Prior art]
Polyester is widely deployed because it has various excellent properties including mechanical properties. In addition, it has been desired to impart more excellent stretch properties to a polyester fabric by a recent stretch boom.
[0003]
As means for imparting stretch properties to polyester fibers, various side-by-side composite fibers have been proposed in addition to false twisted yarns and mixed use of elastic fibers. The side-by-side type composite fiber does not have a feeling of fluffiness and fluffiness like false twisted yarns, and does not have a problem of being inferior in texture, draping property, and dyeability like mixing of elastic fibers such as polyurethane.
[0004]
For example, Japanese Patent Publication No. 44-2504 and Japanese Patent Laid-Open No. 4-308271 disclose a side-by-side composite yarn of polyethylene terephthalate (hereinafter abbreviated as PET) having an intrinsic viscosity difference or an intrinsic viscosity difference, and Japanese Patent Application Laid-Open No. 5-295634. A side-by-side composite yarn of non-copolymerized PET and higher-stretch copolymerized PET is described. If such a side-by-side type composite fiber is used, a yarn having a certain degree of stretchability can be obtained, but there is a problem that a stretch fabric becomes insufficient when made into a woven fabric and a satisfactory stretch woven fabric is difficult to obtain. .
[0005]
Further, for outdoor sports clothing, it is desired to impart water repellency so that a little rain does not pass during rainy weather. For example, Japanese Patent Application Laid-Open No. 11-61643 shows a woven fabric obtained by water repellent treatment using a woven fabric using nylon thick and thin yarns, but the stretchability of the woven fabric is not obtained.
[0006]
[Problems to be solved by the invention]
Therefore, the present invention provides a polyester-based water-repellent woven fabric that has high soft stretch properties and excellent recoverability that are not obtained by the conventional technology as described above, and also has water repellency. Objective.
[0007]
[Means for Solving the Problems]
That is, the present invention is one of a two composite fiber of polyester polymers laminated on side-by-side type along the fiber length direction is a polyester mainly composed of polytrimethylene terephthalate, stretched, then once A woven fabric using multifilaments in which the phase of crimp is not uniform between single yarns by at least one of warp and weft by a method of winding after relaxing without winding, the fabric being subjected to water repellent processing It is a polyester-based water-repellent woven fabric having a woven fabric elongation rate of 16% or more in the direction using the yarn.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
In the polyester water-repellent fabric of the present invention, a polyester side-by-side type composite fiber is used for at least one of warp and weft.
[0009]
Side-by-side type composite fibers are bonded with polymers having different intrinsic viscosities, copolymerization components, copolymerization rates, and the like, and crimps are developed due to differences in their elastic recovery characteristics and shrinkage characteristics. In the case of a side-by-side type composite having an intrinsic viscosity difference, stress concentrates on the high intrinsic viscosity side during spinning and drawing, so that the internal strain differs between the two components. Therefore, the high-viscosity side contracts greatly due to the difference in elastic recovery rate after stretching and the heat shrinkage rate difference in the heat treatment process of the fabric, and distortion occurs in the single fiber, resulting in a three-dimensional coil crimp. It can be said that the diameter of this three-dimensional coil and the number of coils per unit fiber length are determined by the shrinkage difference (including the elastic recovery rate difference) between the high shrinkage component and the low shrinkage component. And the number of coils per unit fiber length increases.
[0010]
The coil crimp required as a stretch material has a small coil diameter, a large number of coils per unit fiber length (excellent stretch characteristics and good appearance), and good coil sag resistance (depending on the number of stretches) The amount of sag of the coil is small and the stretch retention is excellent), and the hysteresis loss at the time of recovery of extension of the coil is small (excellent elasticity and good fit). While satisfying all these requirements, it has a characteristic as polyester, for example, moderate tension, drape, and high dyeing fastness, so that it can be made into a stretch material excellent in total balance.
[0011]
Here, in order to satisfy the coil characteristics described above, the characteristics of the high shrinkage component (high viscosity component) are important. Since the expansion / contraction characteristics of the coil are dominated by the expansion / contraction characteristics of the high contraction component with the low contraction component as a fulcrum, the polymer used for the high contraction component is required to have high extensibility and recoverability.
[0012]
Therefore, the present inventors have intensively studied to satisfy the above-mentioned properties without impairing the properties of the polyester, and as a result, use a polyester mainly composed of polytrimethylene terephthalate (hereinafter abbreviated as PTT) as a high shrinkage component. I found it. PTT fibers have the same mechanical and chemical characteristics as polyethylene terephthalate (hereinafter abbreviated as PET) and polybutylene terephthalate (hereinafter abbreviated as PBT) fibers, which are typical polyester fibers, and elastic recovery properties. The elongation recovery property is extremely excellent. This is because the methylene chain of the alkylene glycol part in the crystal structure of PTT is a Gauche-Gauche structure (the molecular chain is bent at 90 degrees), and further, the density of restraint points due to the interaction between benzene rings (stacking, parallel) This is because the molecular chain can be easily stretched and recovered by the rotation of the methylene group.
[0013]
Here, PTT in the present invention is a polyester obtained using terephthalic acid as the main acid component and 1,3-propanediol as the main glycol component. However, it may contain a copolymer component capable of forming another ester bond at a ratio of 20 mol%, more preferably 10 mol% or less. Examples of the copolymerizable compound include dicarboxylic acids such as isophthalic acid, succinic acid, cyclohexanedicarboxylic acid, adipic acid, dimer acid, sebacic acid, 5-sodium sulfoisophthalic acid, ethylene glycol, diethylene glycol, butanediol, neopentyl glycol, Although diols, such as cyclohexane dimethanol, polyethylene glycol, polypropylene glycol, can be mentioned, it is not limited to these. If necessary, titanium dioxide as a matting agent, fine particles of silica or alumina as a lubricant, hindered phenol derivatives, coloring pigments as an antioxidant may be added.
[0014]
In addition, the low shrinkage component (low viscosity component) is not particularly limited as long as it is a fiber-forming polyester that has good interfacial adhesion with PTT, which is a high shrinkage component, and has stable yarn-making properties. Considering mechanical properties, chemical properties, and raw material prices, PET capable of forming fibers is preferable.
[0015]
The melt viscosity at the spinning temperature of PTT is preferably 1.0 to 5.0 times the melt viscosity at the spinning temperature of the other low shrinkage component. By setting the ratio to 1.0 times or more, preferably 1.1 times or more, the PTT receives a larger spinning stress during fiber formation of spinning, and a stronger crimp expression ability can be obtained. On the other hand, when the ratio is 5.0 times or less, preferably 4.0 times or less, the composite form can be easily controlled, and the bending of the discharged polymer below the die can be suppressed to a level that does not cause any problem in spinning.
[0016]
Moreover, the composite ratio of both components is preferably in the range of high shrinkage component: low shrinkage component = 75: 25 to 35:65 (% by weight) in terms of yarn production and dimensional homogeneity of the coil in the fiber length direction. : The range of 35-45: 55 is more preferable.
[0017]
The cross-sectional shape of the side-by-side type composite fiber used in the present invention may be a round cross-section, a triangular cross-section, a multi-lobe cross-section, a flat cross-section, a Dalma cross-section, an X-type cross-section, or other known irregular cross-sections. From the balance of the texture, a semi-circular side-by-side with a round cross-section, a lightweight side, a hollow side-by-side aimed at heat insulation, a triangular cross-section side-by-side aimed at a dry texture, and the like are preferably used.
[0018]
The single yarn fineness is preferably 1.1 to 10 dtex, more preferably 1.1 to 6 dtex. By setting it to 1.1 dtex or more, the effect of stretchability by crimping can be obtained, and by setting it to 10 dtex or less, a wrinkled feeling can be suppressed.
[0019]
Moreover, in order to overcome the fabric restraining force and develop the coil crimp, it is preferable that the side-by-side type composite fiber has a high shrinkage stress. In order to enhance the crimp development in the heat treatment step of the fabric, the temperature showing the maximum shrinkage stress is preferably 110 ° C. or more, and the maximum value of the stress is preferably 0.25 cN / dtex or more, more preferably the maximum value of the stress. Is 0.28 cN / dtex or more, more preferably 0.30 cN / dtex or more. Further, in terms of suppression of wrinkles, it is preferably 0.50 cN / dtex or less.
[0020]
Moreover, it is preferable that the side-by-side type composite fiber of the present invention has a crimp expression and elongation rate under load of 15% or more. Conventionally, as described in JP-A-6-322661, etc., the latent crimp-expressing polyester fiber was heat-treated in a state close to load-free, and the crimp characteristics were defined there. It cannot be said that it always reflects the crimp characteristics under fabric restraint. Accordingly, the present inventors pay attention to the fact that the ability to develop crimps under fabric restraint is important, and heat treatment is carried out by the method shown in the “Measurement method” in the examples, and the crimp development expression elongation rate under load Defined.
[0021]
That is, the load of 0.9 × 10 ⁻³ cN / dtex assumed to correspond to the restraining force in the fabric is hung on the fiber case and heat treated, so that the crimping ability under the constraint of the fabric is improved. This is expressed in terms of crimp elongation. The higher the crimp expression under load, the higher the crimp expression ability, and if it is 15% or more, the fabric can be provided with the appropriate stretch characteristics of the present invention. The crimp elongation rate is more preferably 20% or more, still more preferably 25% or more, similarly to the stretch performance required for the woven fabric.
[0022]
Incidentally, a PET-based composite yarn having an intrinsic viscosity difference as described in JP-B No. 44-2504, or a combination of non-copolymerized PET and high-shrinkage copolymerized PET as described in JP-A-5-295634. In the case of the composite yarn, the crimp development under load is about 10% at most.
[0023]
In the side-by-side type composite fiber used in the present invention, it is important that the crimp phases are not uniform between the single yarns constituting the multifilament.
[0024]
Conventionally, when a woven fabric is made using side-by-side type composite fibers, the occurrence of wrinkles has been a problem. The possible causes are as follows. In other words, in the side-by-side type composite fiber, crimps having torques in the S and Z directions are easily expressed alternately in a form in which the phases of the multifilaments are aligned, and then the entire multifilament twists at the transition of the S and Z torques. In the woven fabric, it becomes a wrinkle and causes deterioration of the quality.
[0025]
Therefore, the present inventors have found that the phase of crimping between single yarns is shifted as a means for suppressing the occurrence of wrinkles. Here, the phase of crimp refers to a pattern in which the crimp of torque in the S direction and the crimp of torque in the Z direction are alternately expressed in a single yarn. Normally, when crimps are developed in a non-twisted state, the phases of crimps are likely to be aligned due to constraints in the fabric structure and the influence of single yarns. For example, a single yarn exhibits crimps of S torque. In addition, by arranging the crimp of the Z torque of another single yarn, it is possible to cancel each other's torque without impairing the stretch property and suppress the occurrence of wrinkles.
[0026]
As a method of shifting the crimp phase of the highly crimped polyester composite fiber between the single yarns constituting the multifilament, a method of changing the composite ratio of the low shrinkage component and the high shrinkage component between the single yarns, single yarn A method of changing the single yarn fineness between the two can be considered.
[0027]
Further, a method may be considered in which an undrawn yarn of a side-by-side type composite fiber is drawn and then relaxed without being wound once and then wound. This method can shift the crimp phase between single yarns without restricting the composite ratio or single yarn fineness. The following can be considered as the mechanism.
[0028]
First, in the case of a side-by-side type composite fiber using PTT, the elastic recovery property is extremely excellent as described above, and therefore crimps are also exhibited by elastic recovery from the tension during stretching. Accordingly, when the undrawn yarn of this side-by-side type composite fiber is drawn, wound, and unwound, crimps appear, but in this case, the single yarns are in a state of convergence, and thus interfere with each other, and between the single yarns It will be easier to align the phases of crimp.
[0029]
On the other hand, in the case of winding after relaxing without winding once after stretching, the multifilaments are arranged in a flat shape on and between the rollers that perform the relaxation, and the single yarns are not converged. Since the crimps can be expressed independently without interference between the yarns, the phase of the crimps can be shifted.
[0030]
A preferable relaxation rate in relaxation is 0.95 to 0.80 times, more preferably 0.92 to 0.85 times.
[0031]
For this side-by-side type composite fiber, an actual twist may be set according to a desired surface feeling and texture. For example, when there is substantially no twist, specifically, when the number of twists is 500 times / m or less, preferably 300 times / m or less, the fabric has gloss, and a smooth touch and soft texture can be obtained. .
[0032]
A side-by-side type composite fiber yarn is used in a desired direction for applying stretch of at least one of warp and weft.
[0033]
The loom for weaving is not limited, and a water jet room, an air jet room, and a rapier room can be used.
[0034]
The other yarn of the side-by-side type composite fiber yarn can be arbitrarily used, and can be appropriately selected depending on the surface feeling, texture, and intended use.
[0035]
Relaxation heat treatment after weaving, intermediate set, alkali weight loss dyeing, water repellent treatment, finishing set, etc. can be carried out under normal conditions, but in relax heat treatment, the side-by-side type composite fiber crimp is overcome with the fabric binding force. In order to achieve sufficient expression, it is preferable that the temperature in the liquid is 80 ° C. or higher.
[0036]
Next, the woven fabric woven using the side-by-side type composite fiber is subjected to water repellent treatment.
[0037]
As the water repellent finish, for example, fluorine, silicon, wax, paraffin, and the like can be employed. In particular, fluorine is preferable in terms of improving the water repellency while not impairing the soft touch.
[0038]
As an example of the water-repellent processing, for example, after preparing a treatment liquid containing a fluorine-based water repellent, an aminoblast resin, a polyfunctional blocked isocyanate group-containing urethane resin, and ethylene carbonate in one bath, and immersing the woven fabric in the treatment liquid It is preferable to heat-treat.
[0039]
As the fluorine-based water repellent, for example, a bellfluoroalkyl group-containing acrylic copolymer is preferable. The fluorine-based water repellent is preferably 0.01 to 10 parts by weight, more preferably 0.03 to 5% by weight, based on 100 parts by weight of the polyester fabric.
[0040]
As the amino blast resin, for example, melamine resins such as trimethylol melamine and hexamethylol melamine, urea resins such as dimethylol propylene urea, dimethylol ethylene urea and dimethylol hydroxyl urea, dimethylol uron resin and the like can be used. it can. The amount of the aminoblast resin used is preferably 0.01 to 10 parts by weight, more preferably 0.02 to 1 part by weight in terms of solid content, with respect to 100 parts by weight of the polyester fabric to be treated.
[0041]
The polyfunctional blocked isocyanate group-containing urethane resin preferably contains two or more blocked isocyanate functional groups in the molecule. The amount of the polyfunctional blocked isocyanate group-containing urethane resin is preferably 0.01 to 4 parts by weight in terms of solid content with respect to 100 parts by weight of the polyester fabric to be processed.
[0042]
The blending of ethylene carbonate is preferable because it can provide abrasion resistance in a wet state of water repellent processing. The amount of ethylene carbonate used is preferably 0.01 to 30 parts by weight, more preferably 2 to 10 parts by weight with respect to 100 parts by weight of the polyester fabric. If the amount of ethylene carbonate is too large, the texture of the fabric tends to become hard due to dissolution of the polyester fabric, and if it is too small, the wear resistance tends to decrease.
[0043]
The water-repellent performance of the polyester water-repellent fabric of the present invention is preferably 4 or more at the initial water repellency and 3 or more after 20 washings. The initial water repellency is the water repellency defined by “Measurement Method” in the Examples. If the water repellency is 3 or more, the rain hardly penetrates into the fabric if it is worn for a short time in light rain.
[0044]
It is important that the polyester water-repellent woven fabric of the present invention has a woven fabric elongation of 16 % or more with respect to at least one of the processes. The fabric elongation rate is a stretch property parameter defined in “Measurement method” in the examples. When the stretch rate of the fabric is less than 16 %, it is impossible to follow the expansion and contraction of the skin during the movement of the human body, and a product with satisfactory comfort cannot be obtained.
[0045]
【Example】
Hereinafter, the present invention will be described in detail with reference to examples.
[0046]
(Measuring method)
(1) Melt viscosity Measured in a nitrogen atmosphere using a Capillograph 1B manufactured by Toyo Seiki Co., Ltd. The temperature shown in the examples (275 ° C. in Example 1) was taken as the measurement temperature, the measurement at a strain rate of 6080 sec ⁻¹ was performed three times, and the average value was taken as the melt viscosity.
[0047]
(2) Textile elongation rate Measured by the elongation rate A method (constant speed elongation method) of JIS L-1096.
[0048]
(3) Crimp expression and elongation rate under load Crimp expression and elongation rate under load (%) = [(L0−L1) / L0] × 100
L0: Boiling water treatment was performed for 15 minutes in a state where a load of 0.9 × 10 ⁻³ cN / dtex was suspended on a fiber casket, air-dried, and further, 160 ° C. dry heat treatment was performed for 15 minutes with the same load suspended. Later, the heat treatment load was removed, and the casserole length when a 180 × 10 ⁻³ cN / dtex load was suspended.
L1: Lase length when L0 is measured, L0 measurement load is removed, and a load of 0.9 × 10 ⁻³ cN / dtex is suspended again.
[0049]
(4) Shrinkage stress Measured with a thermal stress measuring instrument manufactured by Kanebo Engineering Co., Ltd. at a heating rate of 150 ° C./min. The sample was a 10 cm × 2 loop, and the initial tension was fineness (decitex) × 0.9 × (1/30) gf.
[0050]
(5) Water repellency measured by a JIS L-1092 spray test. After the water-repellent processing, the water repellency in the state of not being washed was defined as the initial water repellency, and the water repellency after washing 20 times according to JIS L-0217 103 was also evaluated.
[0051]
Example 1
A homo-PTT having an intrinsic viscosity (IV) of 1.40 at 275 ° C. and a homo-PTT having an intrinsic viscosity of 0.60 at 275 ° C. and a homo-PET having an intrinsic viscosity (IV) of 0.60 and 275 ° C. were melted separately, respectively, and the spinning temperature It is discharged from a composite spinneret of 24 holes at 275 ° C. at a composite ratio (weight%) of 50:50, taken up at a spinning speed of 1400 m / min, 165 dtex, and 24 filaments of a side-by-side composite structure undrawn yarn (fiber cross section is approximately half A circular junction type) was obtained. Further, using a hot roll-hot plate drawing machine (welding length: 20 cm, surface roughness: 3S), the hot roll temperature is 75 ° C., the hot plate temperature is 170 ° C., and the draw ratio is 3.3 times, and then taken once. Without stretching, it was continuously relaxed at 0.9 times to obtain a drawn yarn of 55 dtex and 24 filaments.
Both the spinning and the drawing had good yarn-making properties, and no yarn breakage occurred.
[0052]
The obtained side-by-side type composite fiber has
Maximum temperature of shrinkage stress: 155 ° C
Maximum value of shrinkage stress: 0.33 cN / dtex
Crimp elongation under load: 50.5%
And showed excellent crimp expression ability. Furthermore, it was a composite fiber that was out of phase of crimping and extinguishes each other's torque.
[0053]
Two warp yarns are used as 110 dtex by twisting two obtained side-by-side composite fibers at a twist of 100 t / m, and the weft yarn is used without applying real twist by aligning two side-by-side composite fibers 55 dtex. A fabric having a 2/2 twill structure was woven using a water jet loom at a green density of 109 × 73 pieces / 2.54 cm.
[0054]
The obtained raw machine was subjected to a relaxing heat treatment at 95 ° C. with an open soaper, dried, intermediately set at a dry heat of 180 ° C., dyed at 120 ° C. and dried.
[0055]
After drying, it was padded with a water repellent treatment solution containing the following components. The pick-up of this processing solution was 60%. Subsequently, it was dried at 110 ° C. for 2 minutes, and heat-treated at 160 ° C. for 45 seconds to give a water-repellent finish to obtain a polyester-based water-repellent fabric of the present invention.
<Water repellent agent>
Fluorine-based water repellent: Maxguard EC-400 (manufactured by Kyo Silk Chemical Co., Ltd.);
60g / L
Aminoblast resin: Sumitex resin M-3 (manufactured by Sumitomo Chemical Co., Ltd.);
5g / L
Aminoblast resin catalyst: SMITEX Accelerator ACX (manufactured by Sumitomo Chemical Co., Ltd.);
1g / L
Polyfunctional block isocyanate group-containing urethane resin: Super Fresh JB-7200 (manufactured by Kyo Silk Chemical Co., Ltd.);
8g / L
Ethylene carbonate (manufactured by Toa Gosei Chemical Co., Ltd.); 20 g / L
Catalyst for block isocyanate: Catalyst WL-2 (manufactured by Kyokin Kasei Co., Ltd.);
1 g / L.
[0056]
The density of the finished product was 143 × 91 pieces / 2.54 cm.
[0057]
As a result of sensory evaluation, the surface of the obtained woven fabric was a woven fabric having no wrinkles, smooth and glossy, having a soft texture and having a soft stretch in the direction of the weft. Moreover, as a result of measuring the fabric stretch rate of this fabric, the warp direction was 18% and the weft direction was 23%.
[0058]
Further, the initial water repellency was 4, and the water repellency after 20 washings was 3, which was a fabric excellent in water repellency.
[0059]
(Example 2)
Using the same warp and weft as in Example 1, a plain fabric with a raw machine density of 74 × 69 / 2.54 cm was weaved by a water jet loom.
[0060]
The obtained raw machine was dyed and water repellent processed under the same conditions as in Example 1. The density of the finished product was 94 × 82 pieces / 2.54 cm.
[0061]
As a result of sensory evaluation, the surface of the obtained woven fabric was smooth, glossy and soft with no wrinkles. Moreover, as a result of measuring the woven fabric elongation rate, the warp direction was 16% and the weft direction was 23%.
[0062]
Further, the initial water repellency was 4, and the water repellency after 20 washings was 3, which was a fabric excellent in water repellency.
[0063]
Example 3
A 55-dtex, 18-filament PET drawn yarn was used as a warp without actual twisting, and the weft used was the same as in Example 1, and the raw machine density was 145 × 95/2 in the water jet loom. A 54 cm 2/1 twill fabric was woven.
[0064]
The dyeing process and the water repellent process were carried out in the same manner as in Example 1 to obtain the polyester water repellent fabric of the present invention. The density of the finished product was 180 × 99 pieces / 2.54 cm.
[0065]
As a result of sensory evaluation, the surface of the obtained woven fabric was smooth, glossy and soft with no wrinkles. Further, the stretch rate in the weft direction of this fabric was 23%.
[0066]
Further, the initial water repellency was 4, and the water repellency after 20 washings was 3, which was a fabric excellent in water repellency.
[0067]
(Comparative Example 1)
A homo-PET having an intrinsic viscosity of 0.40 and a homo-PET having an intrinsic viscosity of 0.75 were melted separately, and the compound ratio (wt%) was 50:50 from a 12-hole composite spinneret at a spinning temperature of 295 ° C. Was taken out at a spinning speed of 1450 m / min, and 145 dtex and a 12-filament side-by-side composite structure unstretched yarn (fiber cross section was substantially semicircular bonded type) were obtained.
Further, using the same hot roll-hot plate drawing machine as used in Example 1, the hot roll temperature was 89 ° C., the hot plate temperature was 150 ° C., and the draw ratio was 2.63 times. I tried to roll up with the next relaxing rate.
[0068]
When the relaxation rate was 0.9 times, reverse winding occurred on the hot roll, and thread breakage occurred frequently.
[0069]
Next, winding was attempted with a relaxation rate of 0.95 times.
[0070]
Accordingly, the yarn was wound at a relaxation rate of 1 (no relaxation) to obtain a drawn yarn of 55 dtex and 12 filaments.
[0071]
The resulting crimped polyester conjugate fiber has a crimp extension under load: 9.0%
Met.
[0072]
In the same manner as in Example 1, two warp yarns were used as 110 dtex by twisting two obtained side-by-side conjugate fibers with a twist of 100 t / m, and weft yarns were used by arranging two side-by-side conjugate fibers 55 dtex. Weaving was performed according to the same standard as in Example 1.
[0073]
The obtained raw machine was dyed and water-repellent processed under the same conditions as in Example 1, and the fabric stretch rate was measured. As a result, the warp direction was 2% and the weft direction was 3%, which was not satisfactory.
[0074]
The fabric was excellent in water repellency and water repellency of 3 after initial water repellency of 4 and 20 washings.
[0075]
【The invention's effect】
According to the present invention, it is possible to provide a polyester-based water-repellent fabric having both high soft stretch properties and water repellency excellent in wearing comfort.

Claims (3)

One is a two composite fiber of polyester polymers laminated on side-by-side type along the fiber length direction is a polyester mainly composed of polytrimethylene terephthalate, stretched, and then without once winding relaxation A multi-filament in which the crimp phase is not uniform between the single yarns by a method of winding after being used for at least one of the warp and the weft, the fabric being subjected to a water repellent treatment, A polyester-based water-repellent woven fabric having a woven fabric elongation of 16% or more in the direction using yarn. The polyester-based water-repellent woven fabric according to claim 1, having an initial water repellency of 4 or more. The polyester-based water-repellent woven fabric according to claim 1 or 2, wherein the side-by-side type composite fiber has a crimp development elongation under load of 15% or more.