JPH06184928A - Production of highly dense web - Google Patents

Abstract

PURPOSE:To provide an excellent peach-like highly dense web by producing fabric from the interlaced yarn of split type polyester fiber with polyester yarn having a thick fineness and subsequently subjecting the fabric to a splitting treatment, a shrinking treatment and a dyeing treatment. CONSTITUTION:Serveral modified cross-sectional ultra-fine fibers 1b each having a fineness of 0.05-0.3 denier, having at least one sharp edge and produced from a copolyester of 2,2-bit-[4-(beta-hydroxyethoxy)phenyl]propane or its ethylene oxide adduct are joined to polyester adhesive phases 1a having a higher alkali solubility than that of the ultra-fine fibers to form a split type polyester fiber yarn. In addition, polyester thick fineness yarn having a hot water shrinkage of 10-15%, a maximum thermal stress value of >=0.4g/de and a fineness of 1.5-10de is formed. Both the yarns are interlaced with each other in an interlacing number of 30-100 turns/m. The interlaced yarns are knitted or woven, and the produced fabric is subjected to a relaxed scouring treatment and simultaneously to a splitting treatment in an alkaline solution, washed with water, dried thermally set and subsequently subjected to a flowing solution dyeing treatment to provide the highly dense web.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a high density fabric suitable for use as a wipe.

[0002]

2. Description of the Related Art Conventionally, as a method for producing a high-density fabric, a polyester-based multifilament yarn having a large fineness with a large hot water shrinkage ratio and a polyester-based multifilament yarn having a small fineness with a hot water shrinkage ratio have been used. A method is known in which a fabric is knitted and woven using a mixed fiber yarn containing a mixture of fibers, and the fabric is heat-treated and shrunk (Japanese Patent Publication No. 61-13009 and Japanese Patent Publication No. 41-40778). . The fabric thus obtained becomes a raised fabric in which the yarns having a high hot water shrinkage contract and become high density, and the yarns having a low hot water shrinkage appear on the surface of the fabric. Further, at this time, as the polyester-based multifilament yarn having a fineness with a small hot water shrinkage rate, a split-type fiber in which polyester-based ultrafine fibers are joined is used, and the fibers are divided into ultrafine fibers. It is also known to expose fibers to obtain a peach-like cloth with a finer brushed surface (Japanese Patent Application No. 2-56).
No. 939).

However, when the cloth thus obtained is subjected to a dyeing process, a polyester-based multifilament having a high hot water shrinkage is dyed with a polyester-based multifilament or a polyester ultrafine fiber having a low hot water shrinkage. It was difficult to dye a uniform hue because of different properties. The cause is that the former filament and the latter filament or ultrafine fiber have different fiber diameters (denier), and even if they are dyed under the same conditions, a filament with a large fiber diameter will inevitably appear darker. Because. Further, a filament having a high hot water shrinkage generally has a low density, and therefore the polyester polymer chains forming the filament are present in a loose state. The reason is that it will be dyed in a dark color compared to.
As described above, when the difference in dyeing occurs, there is a drawback that the obtained cloth has an irregularity phenomenon.

Therefore, when weaving and weaving the fabric, the knitting structure and the weaving structure are devised, or a polyester fine multifilament yarn having a large fineness with a large hot water shrinkage and a polyester fine filament with a small hot water shrinkage are used. It has been proposed to devise a method of aligning the multifilament yarns so that the surface of the fabric is completely covered with the multifilaments or ultrafine fibers having a fineness (Japanese Patent Application No. 3-166336). According to this method, since only multifilaments or ultrafine fibers with a fineness are exposed on the surface of the fabric, when dyed,
The difference in dyeing does not occur in appearance, and the phenomenon of unevenness is less likely to occur. However, even if such a method is adopted,
It has been difficult to completely cover the surface of the fabric with the fine filament multifilament or the ultrafine fiber. Further, in particular, when it is desired to entangle and use a polyester multifilament having a large fineness with a large hot water shrinkage and a polyester multifilament having a small fineness with a hot water shrinkage,
It was difficult to separate the former and latter multifilaments well, and some polyester multifilaments with large fineness appeared on the surface of the fabric, and it was impossible to avoid the phenomenon of flutter.

[0005]

SUMMARY OF THE INVENTION Therefore, according to the present invention, by using, as the ultrafine fibers having a fineness, those formed of a copolyester into which a substance contributing to dyeability is introduced as a structural unit, Even if the fabric is formed of entangled yarns in which fine fibers of fineness and multifilaments of large fineness are entangled, uniform dyeing can be performed, and it is possible to make the resulting fabric less prone to flicker. .

[0006]

That is, the present invention is as follows.
A yarn composed of a split-type polyester fiber that satisfies the requirements (1) to (7), and a yarn composed of a polyester high-fineness fiber that satisfies the requirements (8) to (10) below. Are entangled so that the number of entanglements is 30 to 100 times / meter to obtain an entangled yarn, and then a fabric is knitted and woven using the entangled yarn, and then the splittable polyester fiber is divided. What to do,
The present invention relates to a method for producing a high-density cloth, which comprises shrink-treating the cloth and dyeing the cloth. (1) The split-type polyester fiber is formed by joining a plurality of polyester ultrafine fibers. (2) The plurality of polyester ultrafine fibers are bonded with a polyester bonding agent. (3) The alkali solubility of the polyester-based binder is higher than that of the polyester ultrafine fiber. (4) The polyester-based ultrafine fiber has a modified cross section and has at least one acute angle. (5) The fineness of the polyester ultrafine fibers is 0.05 to 0.3 denier. (6) The polyester ultrafine fiber is formed of a copolyester, and the copolyester has 2,2-bis [4- (β-hydroxyethoxy) phenyl] as its structural unit.
Contain propane or its ethylene oxide adduct. (7) The hot water shrinkage of the polyester ultrafine fibers is smaller than the hot water shrinkage of the polyester thick fibers. (8) The hot water shrinkage ratio of the polyester thick fiber is 10 to 5
Must be 0%. (9) The maximum thermal stress value of the polyester thick fiber is 0.4
g / denier or more. (10) The fineness of the polyester thick fiber is 1.5 to 10 denier.

First, the content of the splittable polyester fiber used in the present invention will be described. This split type polyester fiber is formed by joining a plurality of polyester ultrafine fibers. For example, as shown in FIG. 1, eight polyester ultrafine fibers (1b) are joined by a polyester joining agent (1a). And, the alkali solubility of the polyester-based bonding agent (1a) is
It is higher than the alkali solubility of the polyester ultrafine fibers (1b). This is because when the splittable polyester fiber is dipped in an alkaline aqueous solution, only the polyester binder (1a) is dissolved in the alkaline aqueous solution and removed, and the splittable polyester fiber is split and treated as shown in FIG. This is for producing the polyester ultrafine fibers (1b). The degree of splitting of the splittable polyester fiber can be known by the alkali weight loss rate when a fabric made of this fiber is dipped in an alkaline aqueous solution. In the present invention,
The alkali weight loss rate is preferably about 15 to 30% by weight. If the alkali weight loss rate is less than 15% by weight, the splittable polyester fibers tend to be not sufficiently split, and the dyeability and dyeing fastness may be reduced, and the resulting fabric may be irritated. There is. Moreover, since the ultrafine fibers (1b) existing on the surface of the obtained fabric are not sufficiently divided, the peach-like hand tends to be deteriorated. On the other hand, when the alkali weight loss ratio exceeds 30% by weight, the polyester ultrafine fibers (1b) may be partially dissolved, and the strength of the obtained cloth tends to be lowered.

The cross section of the polyester ultrafine fibers (1b) is atypical and has at least one acute angle. In this way, when the cross section of the polyester ultrafine fibers (1b) is atypical and has at least one acute angle, when the obtained cloth is used as a wiping cloth, as compared with a circular cross section. Further, it is possible to well capture the dirt attached to the spectacle lens and the like, and to remove the dirt well from the lens. For example, when removing stains on a table, rubbing with a sharp object such as a scraper is the same principle as rubbing with a sharp object such as a round rod, rather than rubbing with a round bar. The polyester ultrafine fibers (1b) preferably have a wedge-shaped cross section as shown in FIG. 2 and have an acute angle range of 10 to 90 °, more preferably 20 to 45 °. If the obtuse angle exceeds 90 ° and the resulting cloth is used as a wiping cloth, the stain removability is deteriorated, which is not preferable. Further, the polyester ultrafine fibers (1b) having an acute angle of less than 10 ° tend to be difficult to practically manufacture.

The polyester ultrafine fibers are formed of copolymerized polyester. As the structural unit, 2,2-bis [4- (β-hydroxyethoxy) phenyl] propane or its ethylene oxide adduct is contained. In particular, it is preferable to contain this structural unit in an amount of 2 to 10 mol%. By containing this structural unit, the polyester ultrafine fibers made of the copolyester have improved dyeability, and have a smaller fiber diameter and a higher density than the polyester thick fibers having a large hot water shrinkage ratio. Can also be dyed with the same dyeability as that of the polyester thick fiber, that is, with the same dark color. As a specific example of the copolyester, 85 mol% or more of the structural unit is formed of ethylene glycol and terephthalic acid, and the other structural units include diethylene glycol, 1,4-butanediol, 2,2-bis [4- (β -Hydroxyethoxy) phenyl] sulfone and other diol components, or isophthalic acid, metal salts of isophthalic acid, dicarboxylic acid components such as adipic acid, azelaic acid, and 4-hydroxybenzoic acid are contained in a proportion of 15 mol% or less. Good. In this case, 2,2-bis [4- (β-hydroxyethoxy) phenyl]
It goes without saying that propane or an ethylene oxide adduct thereof is contained in a predetermined amount.

The polyester-based binder may be any one as long as it has a higher alkali solubility than the above-described polyester-based ultrafine fibers, and particularly preferably an alkali weight loss rate of 2 to 20 times faster. Can be used. For example, as the polyester used to form the polyester-based binder, ethylene glycol and terephthalic acid are the main structural units, and polyalkylene glycol, 2,2-bis [4- (β-hydroxyethoxy) phenyl] propane A polyester obtained by copolymerizing the ethylene oxide adduct and a structural unit such as metal sulfoisophthalic acid can be used. Further, a polyester obtained by adding an anionic surfactant may be used. In particular, as a polyester that can be preferably used, ethylene glycol, terephthalic acid, polyethylene glycol having a weight average molecular weight of 600 to 10000 and 10 to 30% by weight, and 5-sodium sulfoisophthalic acid and 1 to 3% by mole are used together. It is preferable to use those obtained by polymerization. This is because the polyester-based binder formed of this polyester has a high alkali weight loss rate and excellent thermal stability.

The fineness of the polyester ultrafine fiber is 0.05 to
It is 0.3 denier. Those having a fineness of less than 0.05 denier are difficult to practically manufacture. Also, the fineness is 0.
When it exceeds 3 denier, it is difficult to remove extremely small stains when the obtained cloth is used as a wiping cloth, which is not preferable. Furthermore, the peach-like feel of the fabric surface is reduced,
It is not preferable because the high-grade feeling of the fabric is impaired. The hot water shrinkage of the polyester ultrafine fibers is smaller than the hot water shrinkage of the polyester thick fibers. If the hot water shrinkage of the polyester ultrafine fibers is higher than the hot water shrinkage of the polyester thick fibers, the polyester ultrafine fibers will shrink more when the fabric is subjected to shrinkage treatment It is not preferable because the polyester ultrafine fibers are less likely to appear on the surface of the fabric, and rather the polyester thick fibers are exposed and a peach-like texture cannot be obtained.

Next, the content of the polyester-based large-fineness fiber used in the present invention will be described. The hot water shrinkage ratio of the polyester high-fineness fiber is 10 to 50%. When the hot water shrinkage is less than 10%, the polyester-based fine-fineness fibers do not sufficiently shrink when shrinking the fabric, and the resulting fabric lacks tension and stiffness. Therefore, it lacks elasticity and repulsion, and when this cloth is used as a wiping cloth, it becomes difficult to use, which is not preferable. Further, if the polyester-based fineness fiber does not shrink sufficiently, even a polyester-based ultrafine fiber having a small hot water shrinkage ratio is difficult to appear on the fabric surface, and the obtained fabric has a good peach-tone feel. It is not preferable because it cannot be done. Conversely, the hot water shrinkage
If it exceeds 50%, the shrinkage of the cloth is severe and the texture of the obtained cloth becomes coarse and hard, which is not preferable. The method of measuring the hot water shrinkage ratio in the present invention is as follows.
That is, once fixing the fiber, apply an initial load of (1/10) g / denier to the other end, measure 500 mm correctly and mark 2 points. Then, after taking an initial load and immersing it in boiling water for 30 minutes, it is taken out, lightly drained with absorbent paper or cloth, and naturally dried in a horizontal state. After that, the initial load is applied again, and the length between the two points is set to lmm. Perform the above lmm measurement 10 times each,
Then, the shrinkage rate is calculated by the formula [(500-1) / 500] × 100, and the average value thereof is taken as the hot water shrinkage rate (%).

The maximum thermal stress value of the polyester high-fineness fiber is 0.4 g / denier or more. Particularly preferably, it is 0.45 to 0.65 g / denier. When the maximum thermal stress value is less than 0.4 g / denier, when the fabric is subjected to a shrinking treatment, the polyester-based fine-fineness fibers do not sufficiently shrink, and it becomes difficult to give good tension and stiffness to the obtained fabric. Therefore, it lacks elasticity and repulsion, and when this cloth is used as a wiping cloth, it becomes difficult to use, which is not preferable. Here, the measuring method of the maximum thermal stress value is as follows. That is, the maximum value of the thermal stress values obtained under the condition of the initial load of 10 g with the thermal stress measuring instrument manufactured by Kanebo Engineering Co., Ltd. is taken as the maximum thermal stress value.

Further, the fineness of the polyester thick fiber is 1.5 to 10 denier. Particularly preferably, 2.0 to 6.
0 denier is good. When the fineness is less than 1.5 denier, the shrinkage force of the polyester-based large-fineness fiber is reduced when the fabric is subjected to the shrinking treatment, and it becomes difficult to give good tension and stiffness to the obtained fabric. Therefore, it lacks elasticity and repulsion, and when this cloth is used as a wiping cloth, it becomes difficult to use, which is not preferable. On the other hand, if the fineness exceeds 10 denier, the texture of the obtained fabric becomes coarse and hard, which is not preferable.

As the polyester forming the polyester type fineness fiber, ethylene glycol and terephthalic acid are generally used as main structural units, and other dicarboxylic acid components and other diol components are used as other structural units. Therefore, it is preferable to use a copolymerized polyester. In particular, isophthalic acid was used as the other dicarboxylic acid component and 2,2-bis [4- (β
It is preferable to use -hydroxyethoxy) phenyl] propane and use a copolyester in which the total number of moles of both is in the range of 5 to 15 mol%. Such a copolyester uses 5 to 15 mol% of isophthalic acid, and is more likely to have a higher hot water shrinkage than a polyester copolymerized with ethylene glycol and terephthalic acid. Further, as the polyester forming the polyester-based fine fiber, the same polyester as the copolyester forming the polyester-based ultrafine fibers may be used. In addition,
In order to obtain fibers having different hot water shrinkages while using the same copolyester, the production conditions, particularly the drawing conditions may be changed.

Both yarns are formed by using the yarn made of the split type polyester fiber made by joining the polyester ultrafine fibers described above and the yarn made of the polyester large fineness fiber explained above. Entangle and get entangled yarns. At this time, the number of entanglements should be 30 to 100 times / meter. Particularly preferably, it is 50 to 90 times / meter. When the number of entanglements is less than 30 times / meter, both yarns are easily separated during weaving and knitting, and unevenness in the warp direction or the weft direction appears on the obtained fabric, which is not preferable. When the obtained cloth is used as a wiping cloth, the polyester ultrafine fibers and the polyester large fineness fibers are easily separated from each other. It is not preferable because extra fine fibers are attached. On the other hand, if the number of entanglements exceeds 100 times / meter, the resulting entanglement marks will be noticeable on the fabric,
Alternatively, the texture becomes coarse and hard, which is not preferable. As a confounding method, various conventionally known methods can be adopted. For example, a method of supplying both yarns with the same overfeed and using a commercially available entanglement nozzle to entangle and perform entanglement, or by making a difference in the supply amount of both yarns and performing the same vortex treatment as described above. A method of performing entanglement, or a yarn composed of split type polyester fibers, subjected to false twisting with a commercially available false twisting machine, and then aligned with a yarn composed of polyester fineness fibers, A method of entanglement by performing a vortex process using a commercially available entanglement nozzle is adopted.

Using this entangled yarn, weaving and weaving is carried out to obtain a cloth. If desired, 100-600T /
It may be twisted in the range of M. This twisting is performed to improve the weaving and knitting properties of the entangled yarns and to give the obtained cloth a proper tension and elasticity. A conventionally known knitting structure or weaving structure can be adopted as the structure of the knitting and weaving.

After the dough is obtained, the splittable polyester fiber present in the dough is split. Splittable polyester fibers are made by joining polyester microfibers that are relatively insoluble in alkali with a polyester binder that is easily soluble in alkali. Can be processed. As the alkaline solution, conventionally known ones are used, but it is most effective to use an aqueous solution of caustic soda in terms of work efficiency and cost. By this splitting treatment, polyester-based ultrafine fibers are produced from the splittable polyester-based fibers in the cloth.

The fabric is subjected to shrinking treatment by applying hot water by various methods. By this shrinking treatment, the polyester-based large-fineness fiber and the polyester-based ultrafine fiber or the split-type polyester-based fiber shrink.
At this time, the polyester-based fine-fineness fiber has a larger hot water shrinkage ratio than the polyester-based ultrafine fiber or the split-type polyester-based fiber, and thus the polyester-based large-fineness fiber has a relatively shorter length. Therefore, the polyester ultrafine fibers or split type polyester fibers having a relatively long length appear on the surface of the cloth.

The fabric is dyed by various conventionally known methods. By this dyeing process, various fibers in the cloth are dyed. The above-mentioned division process, shrinkage process, and dyeing process may be performed in any order, or two or more processes or processes may be performed simultaneously. For example, after performing the dividing process, the shrinking process and the dyeing process may be performed at the same time, or after performing the dividing process, the shrinking process may be performed and then the dyeing process may be performed. Furthermore, various conventionally known treatments or the like may be performed before, during, or after these treatments or processes. For example, the dough may be relaxed or refined before or during the dividing process, or preset may be performed after the dividing process.

[0021]

【Example】

Example First, a 70-denier / 48-filament multifilament yarn composed of split-type polyester fibers having a cross section as shown in FIG. 1 was prepared. This split-type polyester fiber is formed by bonding polyester microfibers to each other with a polyester binder, and the weight ratio of the two is polyester microfiber: polyester binder = 4: 1. . Therefore, the single yarn fineness of the split polyester fiber was about 1.5 denier, and the fineness of one polyester ultrafine fiber was about 0.15 denier. Here, the polyester ultrafine fibers having a wedge-shaped cross section are formed using the following copolyester. That is, 90.5 mol% of the structural unit is composed of ethylene glycol and terephthalic acid, and 4.5% of the structural unit
A copolyester having a mol% of 2,2-bis [4- (β-hydroxyethoxy) phenyl] propane and 5 mol% of the structural unit of isophthalic acid was used. The polyester-based binder contains 13.3% by weight of polyethylene glycol having a weight average molecular weight of 6000 and 2.5% by weight of sulfoisophthalic acid as structural units, and is made of a copolyester composed of ethylene glycol and terephthalic acid. is there. The alkali solubility of this polyester binder was higher than that of the polyester ultrafine fibers. The hot water shrinkage of the polyester ultrafine fiber was 16.5%.

On the other hand, using the same copolyester as the copolyester forming the polyester ultrafine fibers, spinning and drawing treatments are carried out, and a 30 denier / 12 filament of polyester denier filament is formed. A multifilament yarn was obtained. Therefore, the single-filament fineness of the polyester-based high-fineness fiber was 2.5 denier. The hot water shrinkage ratio of this polyester thick fiber is 2
It was 7.0%. In this way, while using the same copolyester, the difference in hot water shrinkage between the polyester ultrafine fiber and the polyester thick fiber is:
This is because the spinning and drawing conditions for obtaining each fiber are different. The maximum thermal stress value of the polyester-based fine-fineness fiber was 0.5 g / denier.

The above two kinds of multifilament yarns were aligned and subjected to an entanglement treatment to obtain an entangled yarn yarn having an entanglement number of 65 times / meter. This entangled yarn was knitted using a double knitting machine LPG-H manufactured by Fukuhara Seiki Co., Ltd. under the conditions of a shuttle diameter of 33 "and a gauge of 28G, with the knitting structure shown in Fig. 3. In Fig. 3, C ₁ and C ₂ are cylinder needles with different butt positions,
D ₁ and D ₂ indicate dial needles having different butt positions, and this knitting structure shows a form in which one course of the knitting is knitted with two yarn feeders.

The knitted fabric (knitted fabric) obtained as described above was subjected to a relaxation treatment and a scouring treatment and a division treatment. That is, this knitted fabric is made of caustic soda 20 g / l
And dipping in a 1g / l aqueous solution of surfactant (temperature: 95 ° C) and splitting the splittable polyester fiber under the conditions of a bath ratio of 1:50 for 30 minutes for both relaxation and scouring. did. After the division treatment, this knitted fabric was washed with water and dried. Then, a heat setter manufactured by Ichikin Kogyo Co., Ltd. was used to preset the warp and weft of the knitted fabric at 170 ° C. for 30 seconds with low tension.

After presetting, dyeing and finishing were performed under the following conditions, and the knitted fabric was subjected to shrinkage treatment and dyeing processing to obtain a high density fabric. <Dyeing and shrinkage> Model used: Circular dyeing machine manufactured by HISAKA CORPORATION Temperature: 130 ° C Time: 40 minutes Dyeing recipe: Dianix Black RB-UP (disperse dye manufactured by Mitsubishi Kasei Co., Ltd.) 15% owf Dianix Black F ( Mitsubishi Kasei Co., Ltd. disperse dye) 5
% Owf Sun Salt RZ-8 (Nippon Kagaku Co., Ltd. leveling agent)
0.5 g / l CH ₃ COOH (48%)
0.2 cc / l <Reducing cleaning> Temperature: 80 ° C Time: 20 minutes Prescription: Bisnol P-70 (One-bath reducing cleaning agent manufactured by Oneshasha Fat & Oil Co., Ltd.) 5 g / l <Finishing set> Model used: Ichikin Kogyo Co., Ltd. Heat Setter Temperature: 170 ℃ Time: 15 seconds

Comparative Example A polyester obtained by polymerizing ethylene glycol and terephthalic acid was used in place of the copolyester forming the polyester ultrafine fibers in the split type polyester fibers used in the examples. A high density fabric was obtained by the same method as in the example.

The following tests were carried out using the high density fabrics obtained by the methods according to the examples and comparative examples. The results are shown in Table 1. [Irradiation on the surface of the fabric]: It was determined whether or not irritability was felt when observed with the naked eye, as compared with a plain dyed product knitted with 100% polyester multifilament yarn that is generally used. The case where irritation was felt was marked with x, and the case where irritation was not felt was marked with o. [Cloth surface density]: The L ^* value measured by a digital colorimeter (manufactured by Macbeth) was used for evaluation. The L ^* value indicates that the smaller the value, the deeper the color is and the uniform dyeing. [Peach feeling]: The suede-like cloth was used as a reference and evaluated by handling. A fabric having a feel similar to that of the suede-like fabric was judged as ◎. [Tension and waist]: An evaluation was made by handling with a strong twist knitted fabric knitted with a strong twist yarn as a reference. The case of having a tension and waist superior to that of the strongly twisted knitted fabric was judged as ◎, and the case of having tension and waist equivalent to that of the strongly twisted knitted fabric was judged as ○. [Wipeability]: Apply 1 mg / cm ² of grease on the glass surface.
After applying 4 cm ² and 30 minutes later, the surface was wiped off with a sample, and the number of times of wiping until it became beautiful was measured. Specifically, it was performed as follows. (a) Glass used; cut glass for microscopes, 75 mm long x 26 mm
The width x 1 mm thickness was used. Before use, the cut glass is washed and dried in advance by the following method. That is, the cut glass is soaked in water containing a synthetic detergent for one night or more, then washed with a detergent and washed with water, and subsequently, water is removed and naturally dried. Then, polish the glass surface with a beautiful cloth. (b) Grease used: No20-30 for high speed ring travelers
00 (Improved product by Kanai Sangyo Kogyo Co., Ltd.) (c) Grease application method: Attach a 1 cm x 4 cm mark on the backing paper to the lower surface of the cut glass and put it in the mark and on the upper surface of the cut glass with your fingertips. Apply grease. The amount of grease to be applied is such that the weight of the cut glass is measured in advance, and the amount of grease is applied so that the amount is 4 mg / cm ² . (d) Wiping method: A sample with a width of 3 cm and a length of 30 cm is placed on the index finger.
Wrap once. Then wipe the glass surface once. The second time, wipe with a new surface of the sample. Wipe off with the new surface of the sample for the third time. Then, the remaining oil film on the glass surface is confirmed. If the oil film remains, wipe the surface of the sample used for the third time up to ten times. From the 11th time, wipe up to 20 times on the new surface of the sample. From the twenty-first time, wipe up to thirty times on the new surface of the sample. (e) When the remaining oil film on the glass surface could not be confirmed at the third time by the above method, the wiping property was judged to be good (⊚).

[0028]

[Table 1]

As is clear from the results of Table 1, the high-density fabrics of the examples have a higher density than the high-density fabrics of the comparative examples.
It was excellent in terms of unevenness of the cloth surface and density of the cloth surface. There was no great difference in peach feeling, tension, waist, and wipeability.

[0030]

The method for producing a high-density fabric according to the present invention comprises a yarn made of a specific split-type polyester fiber and a yarn made of a specific polyester high-definition fiber, Using a entangled yarn that is entangled at the number of entanglements, the fabric is knitted and woven, and then the split type polyester fiber is subjected to a split treatment, the fabric is subjected to a shrinking treatment, and the fabric is dyed. . The polyester-based ultrafine fibers produced by dividing the splittable polyester-based fibers have a smaller hot water shrinkage ratio than the polyester-based fineness fibers, and therefore, the polyester-based ultrafine fibers are applied to the surface of the fabric during the shrinking treatment. Is unevenly distributed. However, since the polyester ultrafine fibers and the polyester high-fineness fibers are entangled with each other, some polyester high-fineness fibers also exist on the fabric surface. When such a fabric is dyed, the polyester ultrafine fibers having a small fineness and a small hot water shrinkage are dyed in a lighter hue than the polyester thick fibers having a large fineness and a large hot water shrinkage. As a result, uneven dyeing results in unevenness. However, the polyester ultrafine fiber used in the present invention is formed of a copolymerized polyester containing 2,2-bis [4- (β-hydroxyethoxy) phenyl] propane or its ethylene oxide adduct as its structural unit. Therefore, the dyeability is good and it is possible to dye in a dark color, and the dyeing fastness is also excellent. Therefore, even though it is an ultrafine fiber, it can be dyed in a dark color, has a hue similar to that of a polyester-based large-fineness fiber having a large fineness and a large hot water shrinkage ratio, and it is less likely to cause irritation.

[0031]

EFFECTS OF THE INVENTION According to the method of the present invention, it is possible to obtain a high-quality, high-density cloth with less fray by the above-mentioned operation. In addition, since the polyester-based ultrafine fibers are unevenly distributed on the surface of the cloth, it is possible to obtain an effect that a good peach-like cloth can be obtained with good touch.

Further, the method according to the present invention is to obtain a high-density fabric by shrinking the polyester-based large-fineness fiber having a large hot water shrinkage ratio. Therefore, the shrinkage of the polyester-based high-fineness fiber can improve the tension and waist of the obtained fabric. Therefore, when this high-density cloth is used as a wiping cloth, there is an effect that the wiping operation is facilitated due to appropriate elasticity and repulsive force. Furthermore, the polyester-based ultrafine fibers unevenly distributed on the surface of the fabric have an irregular cross section and have at least one acute angle. Therefore, when this fabric is used as a wiping cloth, stains are generated at this acute angle portion. Also has the effect of being able to remove satisfactorily. In the above, the case where the high-density cloth obtained by the method according to the present invention is mainly used as a wiping cloth has been described, but various applications such as general clothing centering on women's clothing and industrial materials are also described. It can also be used suitably.

[Brief description of drawings]

FIG. 1 is an example of a splittable polyester fiber used in the present invention, showing a cross-sectional view thereof.

FIG. 2 is a transverse cross-sectional view showing a state where the split polyester fiber of FIG. 1 is split.

FIG. 3 is an example of a knitting structure used in the present invention.

[Explanation of symbols]

 (1b) Polyester microfiber

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification number Office reference number FI technical display location D01F 6/62 K 7199-3B 6/84 J 7199-3B 8/14 B 7199-3B D02G 3 / 04 3/22 D03D 15/00 F 7199-3B D04B 21/00 B

Claims (1)

[Claims] 1. A yarn comprising a splittable polyester fiber satisfying the following requirements (1) to (7), and the following (8) to (10):
Of a polyester-based high-fineness fiber satisfying the requirements of 1. above are entangled so that the number of entanglements is 30 to 100 times / meter to obtain entangled yarns, and then the entangled yarns are used to fabricate A method for producing a high-density fabric, which comprises: weaving and knitting, and then subjecting the split-type polyester fiber to a split treatment, shrink-treating the fabric, and dyeing the fabric. (1) The split-type polyester fiber is formed by joining a plurality of polyester ultrafine fibers. (2) The plurality of polyester ultrafine fibers are bonded with a polyester bonding agent. (3) The alkali solubility of the polyester-based binder is higher than that of the polyester ultrafine fiber. (4) The polyester-based ultrafine fiber has a modified cross section and has at least one acute angle. (5) The fineness of the polyester ultrafine fibers is 0.05 to 0.3 denier. (6) The polyester ultrafine fiber is formed of a copolyester, and the copolyester has 2,2-bis [4- (β-hydroxyethoxy) phenyl] as its structural unit.
Contain propane or its ethylene oxide adduct. (7) The hot water shrinkage of the polyester ultrafine fibers is smaller than the hot water shrinkage of the polyester thick fibers. (8) The hot water shrinkage ratio of the polyester thick fiber is 10 to 5
Must be 0%. (9) The maximum thermal stress value of the polyester thick fiber is 0.4
g / denier or more. (10) The fineness of the polyester thick fiber is 1.5 to 10 denier.