JP2003171849A - Method for producing high-density woven fabric sizable and dryable at low temperature and the resultant woven fabric - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for producing a high-density woven fabric comprising polyester multifilament, specifically involving the technique of sizing warps constituting the fabric by which high-quality/grade sized wars with good size film and cohesive force are obtained by low-temperature drying to the properties of the synthetic fibers and also efficient, stable and economical sizing, warping and weaving operations can be accomplished. <P>SOLUTION: The method for producing the polyester multifilament high- density woven fabric comprises the following process: the warps for the fabric are made twistless or subjected to low twisting ≤5,000 in twist multiplier, then sized with an acrylic sizing agent 3-18 wt.% in concentration and ≤10 mPas in viscosity, and then drying the sized product at a temperature of as low as ≤70°C. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a method for producing a high-density fabric composed of polyester multifilaments and the fabric. Specifically, warp sizing for textiles,
More specifically, the present invention relates to sizing technology. More specifically, low-temperature drying is performed according to the characteristics of the polyester multifilament to obtain a sizing yarn with excellent quality without impairing the physical properties of the material. The present invention relates to a manufacturing method for sizing and sizing, which has a good film and a good binding force, is efficient and stable, and has excellent economical efficiency.

[0002]

2. Description of the Related Art Conventionally, high density woven fabrics using synthetic fibers such as polyester and nylon multifilaments have been manufactured and commercialized and are widely used by consumers. The high-density woven fabric has excellent moisture permeability, water pressure resistance, tear strength, and soft and flexible texture, and its application in the field of sports clothing is particularly remarkable. The high-density fabric uses multifilaments with a relatively small single yarn fineness, and the warp of the fabric called the cover factor,
The coefficient that indicates the degree of clearance between the unit densities of the weft is 200
It can be obtained by weaving with high density of 0 to 3000 class. However, it is not easy to obtain a high-density woven fabric with excellent moisture permeability, water pressure resistance, and tear strength, and including the standard design of a high-density woven fabric, including a sweet twisted yarn, warp glue, warping, weaving, and weaving. High technology is required in each process. For example, in the standard design, the ratio of the cover factor of the warp to the weft is set to 5: 5 to 6: 4,
Weaving the warp without twisting, increasing the number of weft threads, making the fineness of the weft larger than that of the warp, increasing the warp tension in weaving to insert the weft, speeding the closing timing, and arranging in the loom layout. There are many points such as shortening the cloth and shortening the cloth fell.

However, in the method for producing a high-density woven fabric composed of synthetic fibers such as polyester and nylon multifilaments, there are many technical findings regarding standard design and weaving, but little knowledge about warp sizing and sizing, and There is no patent disclosure example. And we found that weaving property is affected by sizing and sizing rather than standard design and weaving technology, and this time, sizing for special polyester, nylon multifilament and other synthetic fibers that require low temperature drying,
I found a gluing method.

[0004]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention The subject of the present invention relates to a method for producing a high-density fabric composed of polyester multifilaments, and more particularly to a warp sizing and sizing technique for constructing the fabric, More specifically, it not only obtains glued yarn with excellent quality by performing low temperature drying according to the characteristics of polyester multifilament, but also has a good glue film and tie strength of the glued yarn, and is efficient and stable. Another object of the present invention is to provide a manufacturing method capable of economical sizing or sizing, warping and weaving.

[0005]

That is, the present invention has the following constitution.

1. In a method for producing a high-density fabric composed of polyester multifilaments having a sum of cover factors of warp and weft of 2000 or more, the warp constituting the fabric is untwisted or sweet twisted with a twist coefficient of 5000 or less, and then a sizing agent concentration Is 3% to 18%, and the viscosity of the paste is 10
A method for producing a high-density woven fabric capable of sizing and drying at a low temperature, which comprises performing sizing or sizing using an acrylic paste having a mPas or less and drying at a low temperature of 70 ° C. or less. The twist coefficient is represented by the product of the square root of polyester multifilament fineness (decitex) and the number of polyester multifilament twists (T / M), and the cover factor is the square root of multifilament fineness (decitex) and the fabric density (book / In). 2. A first feature characterized in that an attachment rate of sizing or sizing of warp constituting a woven fabric is 10% by weight or less.
A method for producing a high-density woven fabric which can be sized and dried at a low temperature as described. 3. The method for producing a high-density woven fabric capable of sizing and drying at low temperature according to the first aspect, characterized in that it is woven by any one of a water jet loom, a rapier loom, an air jet loom, a fly loom, and a gripper loom. 4. Sizing or sizing at low temperature according to the first aspect, characterized in that sizing or sizing is performed using an acrylic paste mainly composed of an acrylic acid ester copolymer or an ammonia salt type of an acrylic acid ester copolymer derivative. Of high density high density fabric. 5. The total cover factor of the warp and the weft constituting the woven fabric is 2000 to 3000, the total fineness of the warp and the weft is 40 decitex to 170 decitex and the single yarn fineness is 1 decitex or less. A method for producing a high-density fabric that can be sized and dried at low temperature. 6. The method for producing a high-density woven fabric capable of sizing and drying at low temperature according to the first aspect, characterized in that the warp constituting the woven fabric is a polyester multi-filament mixed yarn including a spontaneously extending yarn. 7. The shrinkage ratio of the dry warp of the woven fabric at 160 ° C is 15
% Or more of the polyester multifilament or the polyester multifilament mixed yarn, the method for producing a high density woven fabric capable of sizing and drying at low temperature according to the first aspect. 8. A method of sizing a warp constituting a woven fabric obtained by the method for producing a high-density woven fabric according to claim 1, wherein the tying force of a sizing yarn obtained by sizing or sizing is 100 or more. Characterizing sizing Dryable high density fabric.

The present invention will be described in detail below. The high density woven fabric composed of the polyester multifilament of the present invention has a total cover factor of the warp and the weft of 200.
It is necessary that the total fineness of the warp yarn and the weft yarn is from 40 decitex to 170 decitex and the single yarn fineness is 1 decitex or less. The cover factor is a coefficient indicating the degree of clearance between unit densities, and a high cover factor value indicates a small gap, that is, high compactness. In order to obtain excellent waterproofness, the water pressure resistance is 800 kPa, more preferably 1000 kPa.
Pa is required, and a cover factor of 2000 or more is required to satisfy these. However, 3
If it exceeds 000, the texture becomes hard, which is not preferable. Further, the total fineness is preferably a relatively thin filament in order to increase the denseness and to make the texture soft, and it is necessary to have 40 decitex or more and 170 decitex or less, and more preferably 50 decitex or more and 160 decitex or less. However, if it is less than 40 decitex, the tear strength of the woven fabric becomes weak, which is not preferable.
The single yarn fineness is also 1 decitex or less, and more preferably 0.7 decitex or less, in order to increase the denseness. The number of filaments is not particularly mentioned, but it is preferably at least 70 or more, more preferably 100 or more. As for the method for producing a synthetic fiber having a fine single yarn fineness, either single-component spinning or composite spinning may be employed, but the direct spinning method is preferably employed in view of production cost and environmental problems.

The warp yarns constituting the high-density woven fabric of the present invention are required to be untwisted or sweet twisted with a twist coefficient of 5000 or less. High-density fabrics are usually pressed at a dyeing factory in a calendering process to flatten the fibers to reduce the gaps between the tissues. Therefore, the higher the twist number of the warp yarns, the more the fiber converging property is increased, and the fibers are less likely to be flattened in the calendering process. Therefore, the twist number is preferably low, and the more preferable range is no twist or the twist coefficient is 3.
It is 000 or less. It is needless to say that it is preferable that the number of twists of the weft yarn is non-twisted or that the twisted yarn has a twist coefficient of 5000 or less in order to further flatten the fiber. And when applying a sweet twist, an Italian twisting machine classified as an up twister,
Weaving is prepared using a general twisting machine such as a ring twisting machine, a twisting machine, or a double twister classified into a large up twister and a down twister. A double twister having excellent properties is preferably used. When weaving without twisting, it is preferable to subject the polyester multifilament to mixed entanglement, and the degree of mixed entanglement is preferably 20 pieces / M or more and 100 pieces / M or less, more preferably 40 pieces / M. As described above, the number is 80 / M or less, and within this range, there is no problem in the process passability in the twisting and weaving processes. However, if it exceeds 100 M / M, it is not preferable because it causes a texture hardening and an unfavorable uneven appearance. As the mixed fiber entanglement means, an air entanglement nozzle is preferable, and an interlacer nozzle or a Taslan nozzle is preferable.

Then, it is necessary to sizing or sizing the warp yarns, which are untwisted or sweet twisted with a twist coefficient of 5000 or less, by using an acrylic sizing agent and dried at a low temperature of 70 ° C. or less. . Since the warp yarn of the present invention uses a filament having a relatively small single yarn fineness, it is easily fluffed, and the sizing and sizing are insufficient to bundle the filament, and the filament is protected by sizing and sizing.
It is necessary to have a tie and to fluff. The twisted yarn also plays the role of torque and anti-rattle. Acrylic glue refers to polyacrylic acid ester, sodium polyacrylate, etc., but in particular, acrylic acid ester copolymer,
A sizing agent containing an acrylic acid ester copolymer derivative as a main component is preferable. As a general property of acrylic glue, the adhesive strength to hydrophobic fibers such as synthetic fibers is the highest among synthetic glues, and since the glue film is flexible and elastic, it can be said to be the most suitable glue agent for the present invention. . Since the high-density woven fabric of the present invention requires low-temperature drying, a type containing a large amount of an oil agent among acrylic pastes is preferably used. Acrylic paste containing a large amount of oil is excellent in dryability and can be dried even at a low temperature of about 50 ° C. Since the drying efficiency is high, the sizing and sizing speed can be increased. However, low-temperature drying using an acrylic paste with a small amount of oil will result in poor drying and unfavorable opening in the weaving due to adhesion of the warps to each other. Further, since the warp yarns constituting the high-density woven fabric of the present invention are extremely sensitive to temperature, it is necessary to perform sizing and sizing and drying at 70 ° C or lower. Regarding the concentration of the sizing agent, it is necessary to be 3% or more and 18% or less. If it is less than 3%, the adhesive strength to the polyester multifilament is reduced, and since it contains a large amount of water, the drying efficiency is poor, and conversely 18% If it exceeds, not only the penetrability of the sizing agent between the polyester multifilaments deteriorates but also the cohesive force deteriorates, and it becomes difficult to form a uniform sizing film on the fiber surface. There is a risk of falling. The viscosity of the paste is 1
It is necessary to be 0 mPas or less, and if it exceeds 10 mPas, the penetrability of the glue between the polyester multifilaments is deteriorated and the tying force is deteriorated. Although many types of acrylic glue are commercially available, high-density fabric is a product that is relatively difficult to desizing and refining in dyeing plants, so a sizing agent with excellent desizing and refining properties should be selected. It is also important to do so.

It is preferable to add an antistatic agent to the acrylic paste, if necessary. Antistatic agents are essential for hydrophobic fibers such as synthetic fibers. The amount of charge on synthetic fibers varies depending on the moisture content of mixed glue, glued yarn, warping conditions, warping environment, weather conditions, etc., but without an antistatic agent, static electricity is likely to occur in warping and weaving processes. However, there is a risk of impairing process passability. However, it is not preferable to add an excessive amount of an additive such as an antistatic agent because the paste film becomes soft and warp breakage is induced during weaving.

Then, it is desirable that the adhering rate of the warp yarns by sizing or sizing is 10% by weight or less using the above-mentioned mixed sizing. Acrylic glue,
It contains a smoothing agent, a softening agent, an antistatic agent, a penetrating agent, etc., and can improve passability in the warping and weaving process of the high-density woven fabric made of the synthetic fiber of the present invention and improve the quality of raw fabric. it can. However, if the amount exceeds 5% by weight, the adhesive film is weak and the amount of adhesive is slightly removed, and the cost and cost of the acrylic adhesive are not good. Considering the fluff binding, tying force, warp and passability in the weaving process of the sizing yarn, the preferred amount range of the sizing yarn is 1% by weight or more and 3% by weight or less. For sizing and sizing, a single sizing machine that excels in small lot production and a warping sizer that excels in mass production are used. Individual condition settings for sizing and gluing, specifically speed, drying temperature, glue concentration,
The sizing temperature, roller speed, sizing surface height, etc. will vary depending on the sizing and sizing machines and the characteristics of the synthetic fibers, but the sizing and sizing process operability, the moisture content of the sizing thread and the quality grade It is important to set the conditions considering the process passability in the post-processing process.

If necessary, after-waxing or after-oiling is applied to the sized yarn to further improve smoothness and prevent warp breakage and warp shed failure. However, if the adhered amount increases, not only the cost will increase, but conversely, the smoothness will deteriorate, and the degreasing and scouring properties in the dyeing factory will deteriorate.

[0013] It is desirable that the number of times of tying force of the sizing yarn obtained by sizing and sizing according to the present invention by a tying force tester is 100 times or more. The tying force tester is a tester that quantitatively measures the tying force of the sizing yarn, that is, the number of times of friction until cutting, and if the value is low, the sizing yarn has no tying force and the sizing agent Is not permeated into the interior of the multifilament, that is, it is likely that the filaments are easily dispersed and the filaments are not fixed to each other. Therefore, it is necessary to increase the number of times of tying force for a severe repulsive beating motion such as a high-density fabric on a loom, which is necessary at least 100 times or more, preferably 150 times or more.

The high-density woven fabric made of the synthetic fiber of the present invention is preferably woven by any of a water jet loom, a rapier loom, an air jet loom, a fly loom, and a gripper loom. In the sizing and sizing method of the present invention, as described above, an acrylic paste containing a large amount of an oil agent and excellent in smoothness is used, and since the amount of adhesion is suppressed to 10% by weight or less, weaving problems such as gum up are less likely to occur. I can imagine. Therefore, it can be mounted on a dry loom, and naturally, it can be mounted on a water jet loom because sizing and sizing are performed using only acrylic paste. Above all, a water jet loom, a rapier loom, and an air jet loom, which are excellent in productivity, are preferably used.

The high-density woven fabric comprising polyester multifilaments of the present invention is preferably composed of polyester multifilament mixed yarns in which the warp constituting the yarn includes spontaneously extending yarns. A polyester multi-filament mixed fiber including a spontaneously stretched yarn can be usually obtained by confounding two or more kinds of filaments having different shrinkage ratios.
A warm texture such as bulkiness, swelling or warmth can be provided. Therefore, a high-density woven fabric composed of polyester multifilaments including spontaneously stretched yarns should have high functionality such as water pressure resistance and tear strength, and should also be a high-value-added high-density woven fabric with softness, bulkiness, and bulging. Can be done.

The high density woven fabric comprising the polyester multifilament of the present invention has a dry heat of warp yarns constituting the woven fabric 160
A polyester multifilament or a polyester multifilament mixed fiber having a shrinkage rate of 15% or higher is desirable. When weaving a high-density woven fabric such as the present invention, the weft driving density is usually about 100 yarns / in or more, but depending on the standard or the type and number of warp yarns, the wetting yarn density may be increased. In some cases, it becomes difficult and it is difficult to obtain a high-density fabric having excellent water pressure resistance. Therefore, by using warp yarns having a high shrinkage rate of dry heat of 160 ° C., it is possible to easily obtain a woven fabric having a high length and having a high density during relax scouring. However, if the shrinkage factor at dry heat of 160 ° C. is less than 15%, sufficient length cannot be expected, and a woven fabric with a high density cannot be obtained.

Examples of the polyester multifilament of the present invention include polyesters whose main component is polyethylene terephthalate, which can be obtained by polymerizing by a conventional and known method, but within a range not impairing the object of the present invention. The other third component may be copolymerized with. Specifically, dicarboxylic acids such as adipic acid, oxalic acid, sebacic acid, isophthalic acid, 5-sodium sulfoisophthalic acid, glycols such as diethylene glycol and polyethylene glycol, bisphenol A or its ethylene oxide adduct, and hydroxybenzoic acid. These oxycarboxylic acids and the like can be used alone or in combination of two or more kinds. Further, additives such as a matting agent, an antioxidant, a fluorescent whitening agent, an ultraviolet absorber, an antistatic agent, a flame retardant and the like may be added within a range not impairing the object of the present invention.

The cross-sectional shape of the synthetic fiber used in the present invention is round, triangular, polygonal such as square, flat, hollow,
It may have any shape such as a star or a gear, and is not limited to the present invention. The synthetic fiber may be a false twisted yarn that is false twisted by a false twisting machine, thick and thin having a thickness in the length direction, or a special multifilament having many irregularities on the fiber surface.

The present invention will be described in more detail with reference to the following examples, but the present invention is not limited thereto. Incidentally, the adhesion rate, viscosity, used in the present invention,
The number of tying forces, water pressure resistance, and tear strength were measured by the following methods.

[Adhesion rate] Using a wrap reel having an appropriate frame circumference, 100 m of synthetic fiber before sizing is removed. Similarly, 100 m of the sized yarn after sizing and sizing is removed. The weights of both were measured using a balance, and the adhesion amount was calculated using the following formula. Note that the fogging was performed three times, and the average value was substituted into the following formula. Adhesion rate (% by weight) = (glued yarn-fiber before gluing) × 10
0 / Fiber before viscosity [Viscosity] The viscosity was measured using a B-type viscometer at a sizing agent temperature of 40 ° C. [Number of times of tying force by tying force tester] Patent No. 601116
Using the Ebisu-type automatic recording warp tying force tester manufactured by Ebisu Riken Co., Ltd. described above, the sample was applied in the same manner as in the filament yarn and spun twin yarn test, and the rotation number of the friction plate was 80 rpm and the load was 20 g. The number of tying forces until the cut was measured. The number of times was an average value of 4 times. [Water pressure resistance] It was measured using a water resistance tester (for low water pressure) described in JIS L-1092. [Tear strength] It was measured according to the pendulum method described in JIS L-1096.

[0021]

(Example 1) Using polyethylene terephthalate semi-dal resin, an undrawn yarn obtained by melt spinning was drawn by a drawing machine to obtain an drawn yarn of 84 decitex 360 filament round cross section. Next, using 309 type double twister manufactured by Murata Kikai Co., Ltd. for the drawn yarn for warp, the number of twists is 300 T / M in the S twist direction (twist coefficient 2750).
I twisted the yarn. Next, gluing was performed with a single sizing machine YS-6 manufactured by Yamada Co., Ltd. at a speed of 250 M / min, a drying temperature of 55 ° C., a sizing liquid temperature of 40 ° C., and an adhesion amount of 4.5% by weight. . As the sizing agent, an acrylic acid ester copolymer ammonium salt type plus size J-3100 manufactured by Kyodo Chemical Co., Ltd. was used, and the sizing agent concentration was 8% and the sizing agent viscosity was 2%.
It was mPas. In addition, the number of times the tying force of the sizing thread by the tying force tester was 195 times. Then, the obtained sized yarn
Warping was performed using a NAS SUPER-130W type manufactured by Suzuki Warper with a reed width of 130 cm and a warp count of 7412. After the insertion, a beam was set on a water jet loom ZW-150 type manufactured by Tsudakoma Kogyo Co., Ltd., and then a non-twisted drawn yarn having a circular cross section of 84 decitex 360 filament was driven as a weft yarn. The weavability was very good, and warp breakage due to fluff generation was not a problem. In the warping process, static electricity is generated,
There were no particular problems such as glue removal. And the quality of the obtained raw fabric is high, and the raw fabric density is (148 /
in, 94 / in). The greige fabric was passed through ordinary relaxing refining, dyeing and finishing processes to obtain a dyed cloth. The water resistance of the dyed fabric was 11.7 kPa, the tear strength was 1810 cN in the warp direction and 1255 cN in the weft direction, and it was a polyester multifilament high-density fabric suitable for sports applications.

(Example 2) In Example 1, 18 filaments of 33 decitex exhibiting a spontaneous elongation of 2% and 50 decitex 2 exhibiting a shrinkage of 15% at a dry heat of 160 ° C.
400T twist in S twist direction in mixed filament yarn with 4 filaments
A dyed fabric was obtained in exactly the same manner except that the twisting yarn was twisted at a twist ratio of / M (twist coefficient 3644). The dyed fabric is a polyester multifilament high-density fabric suitable for sports applications, and has a water pressure resistance of 9.5 kPa and a tear strength of 12 in the warp direction.
It was possible to obtain a high-density woven fabric exhibiting a soft feeling, a bulging feeling, and a bulky feeling, which was 00 cN and showed a weft direction of 850 cN, and which was rich in warm feeling.

Comparative Example 1 A dyed fabric was obtained in the same manner as in Example 2, except that sizing was performed at a drying rate of 75 ° C. The dyed fabric was a polyester multifilament high-density fabric excellent in water pressure resistance and tear strength suitable for sports applications, but the softness, swelling, and bulkiness obtained in Example 1 were not felt at all. .

Comparative Example 2 In Example 2, the twist number was 80
A dyed fabric was obtained in exactly the same manner except that the yarn was twisted at 0 T / M (twist coefficient 7288). The dyed fabric was a polyester multifilament high density woven fabric suitable for sports applications, but as in Comparative Example 1, it was a high density woven fabric with very poor softness, swelling and bulkiness.

(Comparative Example 3) In Example 2, warping was carried out with 5560 warp yarns to obtain a greige density of (111 yarns / in,
A dyed fabric was obtained in exactly the same manner except that the fabric was woven at 85 yarns / in). Although there was no problem in processability in warping and weaving, the water pressure resistance of the dyed fabric was 4.0 kP.
It was a and could not be called a high-density fabric.

(Comparative Example 4) A dyed fabric was obtained in the same manner as in Example 2, except that the sizing agent concentration was 24%, the sizing agent viscosity was 16 mPas, and the adhesion amount was 15%. The dyed fabric was a polyester multi-filament high-density fabric suitable for sports applications, but the amount of glue consumed in the sizing process was high and the cost was high. In the weaving process, reeds, healds, and drop glue on the loom were used. Was slightly observed.

[0027]

EFFECTS OF THE INVENTION By performing the low temperature drying of the present invention, not only the characteristics of the synthetic fiber are not impaired, but also the sized yarn with excellent quality is obtained, and the sized glue film of the sized yarn and the binding strength are also good. It is possible to perform sizing or sizing, warping, and weaving that are efficient, stable, and have excellent economical efficiency.

   ─────────────────────────────────────────────────── ─── Continued front page    F-term (reference) 4L033 AA07 AB05 CA18                 4L036 MA05 MA33 PA21 PA33 PA42                       PA43 RA13 UA21                 4L048 AA20 AB07 AB12 BA01 CA15                       DA03 EA00                 4L050 AA12 AA15 AA16

Claims (8)

[Claims] 1. The sum of cover factors of warp and weft is 2
In a method for producing a high-density woven fabric composed of 000 or more polyester multifilaments, the warp constituting the woven fabric is untwisted or sweet twisted with a twist coefficient of 5,000 or less, and then a sizing agent concentration of 3% to 18%, a sizing agent A method for producing a high-density woven fabric capable of sizing and drying at a low temperature, which comprises sizing or sizing using an acrylic paste having a viscosity of 10 mPas or less and drying at a low temperature of 70 ° C. or less. The twist coefficient is expressed by the product of the square root of polyester multifilament fineness (decitex) and the number of polyester multifilament twists (T / M), and the cover factor is the square root of multifilament fineness (decitex) and the fabric density (book / In). 2. The method for producing a high-density woven fabric which can be sized and dried at a low temperature according to claim 1, wherein the adherence rate of the warp yarns constituting the woven fabric by sizing or sizing is 10% by weight or less. 3. A water jet loom, a rapier loom,
The method for producing a high-density woven fabric capable of sizing and drying at low temperature according to claim 1, wherein the weaving is performed by any one of an air jet loom, a fly loom, and a gripper loom. 4. The sizing or gluing is performed by using an acrylic paste mainly composed of an acrylic acid ester copolymer or an ammonia salt type of an acrylic acid ester copolymer derivative. For producing a high-density fabric that can be sized and dried at low temperature. 5. The sum of cover factors of the warp and the weft constituting the woven fabric is 2000 to 3000, the total fineness of the warp and the weft is 40 decitex to 170 decitex and the single yarn fineness is 1 decitex or less. The method for producing a high-density fabric that can be sized and dried at low temperature according to claim 1. 6. The method for producing a high-density woven fabric which can be sized and dried at low temperature according to claim 1, wherein the warp constituting the woven fabric is a polyester multifilament mixed yarn containing a spontaneously stretched yarn. 7. The sizing-dryable at low temperature according to claim 1, wherein the warp constituting the woven fabric is a polyester multifilament or a polyester multifilament mixed yarn having a shrinkage of 15% or more at a dry heat of 160 ° C. Of high density high density fabric. 8. A tying frequency of a sizing yarn obtained by sizing or sizing a warp constituting a woven fabric obtained by the method for producing a high-density woven fabric according to claim 1 by a tying force tester is 100 times. The sizing-dryable high-density fabric characterized by the above.