JP3333831B2 - Polyester thick yarn - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thick polyester multifilament yarn. For more information,
The present invention relates to a thick and thin thread having a large hole formed on the surface of a thick portion and a small hole formed on a detailed surface thereof by performing an alkali weight loss treatment, and capable of visually enhancing the thick and thin feeling.

[0002]

2. Description of the Related Art Polyester thick and thin yarns obtained by non-uniformly stretching polyester undrawn yarns are used in large quantities in outer garments of men and women. The polyester thick and thin yarn has a feature of a thick and thin form in which a thick portion and details are repeated in the length direction of the yarn, and a feature of a dyed surface in which the thick portion is deeply dyed and details are lightly dyed. have.

[0003] The characteristic of the thick and thin form surface is that, with a multifilament yarn having a fineness of 200 denier or less, it is difficult to visually recognize the unevenness of the fineness from the side of the yarn with the naked eye. The presence of the thick portion and the details can be clearly recognized only when the image is enlarged using a microscope and observed from the direction of the yarn cross section. On the other hand, the characteristic of the dyed surface, in which the thick part is deeply dyed and the details are lightly dyed, can easily exhibit its effect by ordinary dyeing processing, and is recognized as a hazy appearance. Accordingly, almost all of the thick and thin yarns obtained by non-uniformly stretching polyester undrawn yarns have been used as fabrics utilizing the appearance effect of crepe-like appearance due to dyeing differences.

[0004] On the other hand, a slab-like appearance fabric of white fabric utilizing a thick and thin form effect is produced only in a very small amount as a woven fabric for a folk costume tobe. In order to express the effect of thick and thin morphological irregularities on the fabric, it is not sufficient to apply a normal dyeing process as a fabric to a thick and thin yarn obtained by simply unevenly stretching a polyester undrawn yarn. It is carefully produced by controlling the thick and fine spots under the conditions and uneven stretching conditions, and controlling the condition range of the self-stretching and thick spots expansion by the dyeing condition and the heat setting condition.
The reproducibility of the production is also extremely difficult.

[0005] For the above reasons, the development of a new polyester thick and thin yarn focuses exclusively on the diversification of the appearance of the light and shade pattern of dyeing, and except for the concept of "expansion of the fine and fine ratio", the thick and thin feeling of the polyester is obtained. The development of a thick thread that emphasizes the effect has not yet been made.

[0006]

SUMMARY OF THE INVENTION An object of the present invention is to provide a polyester fine yarn capable of visually recognizing thick and thin differences, that is, a slab-like appearance, in a light-colored cloth of white or light color. Is to do. Another object of the present invention is to provide a production method capable of producing such a thick and thin yarn with good reproducibility by non-uniform stretching under ordinary control.

[0007]

SUMMARY OF THE INVENTION The present invention is a means for enhancing the thickness difference of polyester thick and thin yarns so that they can be visually recognized. Knowing that there is, changing the viewpoint completely, giving the difference between the reflection and absorption of light that can be placed on the yarn surface between the thick part and the details,
It is based on the idea of emphasizing the thickness to a level that can be recognized by the naked eye. Means for solving the problems of the present invention embodying such an inventive idea are as follows.

(1) General formula

[0009]

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(Wherein Y is a hydrogen atom or an ester-forming functional group, M ₁ and M ₂ are metals, and n is 1 or 2). A thick and thin polyester multifilament yarn composed of a polyester contained in the range of 0.3 to 15 mol% based on the amount of the functional carboxylic acid component. 3. Polyester thick and thin yarns having pores having a pore size (L: μm), and 0.1 ≦ L (details) ≦ 1.0 1.5 ≦ L (thick) ≦ 4. 0 (2) General formula

[0011]

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(Wherein, Y is a hydrogen atom or an ester-forming functional group, M ₁ and M ₂ are metals, and n is 1 or 2). Unstretched yarn obtained by melt-spinning a polyester containing 0.3 to 15 mol% of the functional carboxylic acid component at a spinning speed of 1,000 to 4,000 m / min. The temperature 15-85 ° C
In the range of, and stretch ratio of 0.3 to the natural stretch ratio
A method for producing a polyester thick and thin yarn, comprising performing non-uniform drawing in a range of 0.85 times, forming the obtained non-uniform drawn yarn into a woven or knitted fabric, and then reducing the alkali in a range of a weight loss rate of 5 to 40%. .

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION The multifilament assembling form of the thick and thin yarn of the present invention is the same as a conventionally known so-called thick and thin yarn or a thick and thin yarn.

FIG. 1 schematically shows a side view of the yarn of the present invention. In the figure, a multifilament yarn bundle is formed from a thick portion 1 and a detailed portion 2, and the thick portion 1 is composed of a set of thick portions 3, 3 ', 3 ",... Detail 2 is the details 4,4 ', of the individual filaments.
4 ″,....

Here, all the individual filaments constituting the thick portion 1 need not be the thick portion of the filament, and if more than half, preferably more than 2/3 of the constituent filaments are the thick portion, the multifilament yarn is used. The effect as a thick part can be obtained. On the other hand, all of the individual filaments constituting the detail 2 may not be the details of the filament. However, if at least 4/5, preferably 9/10 or more of the constituent filaments are the details, the effect as the detail is easily exerted.

The method for producing the thick and thin yarn of the present invention will be described. First, the general formula

[0017]

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(Wherein, Y is a hydrogen atom or an ester-forming functional group, M ₁ and M ₂ are metals, and n is 1 or 2). What contains 0.3 to 15 mol% with respect to the functional carboxylic acid component is used.

In the above formula, M ₁ and M ₂ are metals, and M ₁ is particularly an alkali metal, an alkaline earth metal, Mn.
_1/2 , Co _1/2 or Zn _1/2 are preferred.
_{i, Na, K, Ca 1/2} , Mg 1/2 is particularly preferred, M ₂
Particularly, an alkali metal or an alkaline earth metal is preferable, and Li, Na, K, Ca _1/2 and Mg _1/2 are particularly preferable. M ₁ and M ₂ may be the same or different. n is 1 or 2. Y is a hydrogen atom or an ester-forming functional group, and the functional group is -COOR
(Where R is a hydrogen atom, an alkyl group having 1 to 4 carbon atoms or a phenyl group) or —CO— [O (CO ₂ ) ₁ ] _p −
OH (1 is an integer of 2 or more, p is an integer of 1 or more)
Are preferred.

Preferred examples of the sulfonic acid compound include 3-carbomethoxybenzenesulfonic acid N
a-5-Carboxylic acid Na, 3-carbomethoxy-benzenesulfonic acid Na-5-carboxylic acid K, 3-carbomethoxy-benzenesulfonic acid K-5-carboxylic acid K, 3-
Hydroxyethoxycarbonyl benzenesulfonic acid N
a-5-Carboxylic acid Na, 3-carboxy-benzenesulfonic acid Na-5-carboxylic acid Na, 3-hydroxyethoxycarbonyl-benzenesulfonic acid Na-5-carboxylic acid Mg _1/2 , benzenesulfonic acid Na-3, Examples thereof include sodium 5-dicarboxylate and sodium benzenesulfonate-3,5-dicarboxylate Mg _1/2 .

The sulfonic acid compounds may be used alone or in combination of two or more. The polyester may be added at any stage in the production of the polyester fine fiber before the end of the melt-spinning. For example, the polyester may be added and blended in the raw material of the polyester or added during the synthesis of the polyester. Alternatively, it may be added after the completion of the synthesis and before the melt-discharge spinning. In any case, it is preferable to mix in a molten state after the addition.

The sulfonic acid compound is used in an amount of 0.3 to 15 with respect to the bifunctional carboxylic acid constituting the polyester.
It is contained in the range of mol%. If the amount is less than 0.3 mol%, the effect of enhancing the visual and fine feeling, which is a feature of the present invention, cannot be obtained. If the amount exceeds 15 mol%, the yarn strength may not be practically usable due to the alkali treatment. From the viewpoint of achieving both visual emphasis on thick and thin feeling and practical durability, the preferable content range is 0.5 to 10 mol%.

Next, a spinning of the polyester described below,
The thick and thin yarn obtained by non-uniform stretching is subjected to a weight reduction treatment with an alkali solution to elute the sulfonic acid compound contained in the polyester and form pores as traces for the removal on the filament surface. Large holes are formed on the surface of the part as compared with holes formed on the detailed surface.

FIG. 2 is a schematic view of pores formed in a thick portion and details after the thick thread of the present invention is subjected to a weight reduction treatment with an alkaline solution. In the figure, a large hole 7 is present in the thick portion 5 and a smaller hole 8 is present in the detail 6 as a trace of removal of the sulfonic acid compound.

The size of the pores is preferably in the following range, when the average value of the major axis and minor axis of the pores is expressed as the pore size (L). 0.1 ≦ L (details) ≦ 1.0 1.5 ≦ L (thick part) ≦ 4.0 where L (details) is the average pore diameter (μm) of the fine pores,
L (thick part) is the average pore diameter (μm) of the thick part fine pores.
Observation at ~ 5000 magnifications, the average pore diameter of the 20 largest pores in the electron micrograph taken from 500 μm ² of the yarn surface is determined.

When L (thick portion) is less than 1.5 μm, it is difficult to obtain an appearance effect by forming a thick hole. L (thick) is 4.
If it exceeds 0 μm, the strength as a fiber of the thick portion is extremely reduced due to the large pores, and the tear strength of the woven or knitted product may be reduced. Further, problems such as powder dropping may occur. On the other hand, if L (details) exceeds 1.0 μm, the difference from the thick part becomes small, and it becomes difficult to obtain the desired appearance effect.

The thick-to-fine ratio of the thick part to the fine part of the thick and thin yarn of the present invention is preferably in the range of 1.2 ≦ H (thick part) / H (detail) ≦ 3.0.

Here, H (thick portion) is a thick portion average yarn diameter, H
(Details) is the average thread diameter of the details. The multifilament is cut perpendicularly to the fiber axis direction so that the cross-sectional shape of the multifilament in the thick portion and the details can be understood, the cross section is observed with an electron microscope, and the diameter of each single fiber (equivalent to a perfect circle) is measured The average diameter at the cutting point is measured for any of 20 cross sections, and is represented by the average value.

When H (thick part) / H (detail) is less than 1.2, there is little difference in the fiber microstructure between the thick and thin parts. Some voids cannot be formed, and the object of the present invention cannot be achieved. Conversely, H
If it is attempted to obtain a yarn having a (thick portion) / H (detail) exceeding 3.0, uneven stretching will be impossible and the processability will be unstable.

The length in the yarn length direction of the thick part and the fine part of the thick and thin yarn of the present invention may be determined based on the appearance effect required for the woven fabric as a product, but in order to express a slab-like spanned appearance, the length is required. Preferably, the ratio is as follows: 1.3 ≦ W (detail) / W (thick part) ≦ 10 where W (detail) is the average detail length (mm), W (thick part)
Is the average length of the thick part (mm), which is represented by the average length of the lengths at arbitrary 20 places of the thick part and the detail.

Here, the conditions of the above-described spinning and non-uniform stretching will be described. First, the polyester is spun at a spinning speed of 1,0.
The melt spinning is performed at a speed in the range of 00 to 4,000 m / min.
If the spinning speed is less than 1,000 m / min, the strength of the obtained undrawn yarn is extremely low, and winding becomes difficult. On the other hand, when spinning at a speed exceeding 4,000 m / min, the molecular orientation of the obtained undrawn yarn proceeds, and it becomes difficult to obtain a thick and thin yarn in the subsequent drawing step.

The undrawn yarn obtained by spinning has a fiber structure in which the sulfonic acid compound fine particles are dispersed in a polyester matrix.

The undrawn yarn obtained by melt spinning is heated at a temperature of 15-8.
In the range of 5 ° C., and the stretching ratio is 0.3% of the natural stretching ratio.
In the range of ０．８0.85 times, non-uniform stretching is performed to obtain thick details.

The temperature and the draw ratio of the non-uniform drawing are selected within a range in which the polyester undrawn yarn can be drawn as a yarn having large and thin spots.

If the temperature is 85 ° C. or lower, non-uniform stretching can be performed.
C. or lower is preferred. Further, at room temperature (usually 18-2
Stretching at 5 ° C.) is economically preferable since the stretching roller does not need to be heated. If the temperature is lower than 15 ° C., non-uniform stretching is possible, but it is difficult to control the temperature. If the temperature exceeds 85 ° C., the stretching becomes uniform.

The stretching ratio should be in the range of 0.3 to 0.9 times the natural stretching ratio in order to perform uneven stretching. 0.3
If the ratio is less than 2 times, the ratio of the large diameter to the small diameter can be obtained, but the ratio of the thick portion becomes too large. If the ratio exceeds 0.9 times, uniform stretching is approached. From the ratio of the diameter to the diameter of the thin part and the ratio of the length of the thick part to the small part, the preferred stretching ratio is in the range of 0.4 to 0.85 times the natural stretching ratio.

The most preferable condition range in which the combination of the temperature and the stretching ratio achieves compatibility between the thick and thin form and the processability is as follows: the temperature is room temperature, and the stretching ratio is 0.4 to 0.85 times the natural stretching ratio. This is the case. Boiling water shrinkage of thick and thin thread is 5-2
After the non-uniform stretching, the film may be heat-set at a temperature of 120 to 200 ° C. in order to improve the thermal handleability by setting it to about 5%.

[0038]

The invention according to the present invention, particularly the manufacturing method according to the second aspect, is not based on a mere total combination of the prior arts, but is based on the conventional technically advanced idea. Creates a new fiber structure that transcends the category of, and thereby has the advantage of being able to express a thick slab-like appearance effect on white fabric, which was difficult with conventional thick and thin yarns Is clarified by a comparative example.

A method for forming pores on the fiber surface of a polyester filament is a method in which inorganic fine particles or an organic compound incompatible with the polyester are contained in the polyester, and the resulting mixture is spun and drawn into filaments to reduce the alkali. It has been known.

As the inorganic fine particles, fine particles of titanium oxide, silica, and barium sulfate are known. By using these, fine particles are formed in the same manner as in the present invention. The size of the hole is the same between the thick portion and the detail, and a difference in the size of the hole cannot be provided.

Also, in the case of an organic compound incompatible with polyester, RSO ₃ M ₃ (M ₃ is a metal, R is an alkyl,
Even in the case of an aryl or alkylaryl group), the size of pores as fine particles removal traces due to alkali weight reduction is the same between the thick part and the small part, and it is not possible to provide a difference in pore size.

FIG. 3 schematically shows pores formed on the surface of the polyester thick thread containing RSO ₃ M ₃ after alkali treatment. There is no difference in the sizes 12 and 13 of the pores as the traces of removing fine particles between the thick portion 9 and the fine portion 10, and the thin portion is simply reduced to the slit shape 11 because the thick portion has low orientation. The slit-shaped groove 11 does not have the effect of making the yarn visually thick due to the difference in light reflection and absorption.

That is, generally, polyester thick and thin yarns are produced by non-uniformly stretching undrawn yarns. Therefore, even if crystallization is progressing, thick portions are easily reduced in alkali because of low degree of orientation. Since the crystallization proceeds and the degree of orientation is high, it is difficult to reduce the alkali. Therefore, a slit-shaped groove is generated in the thick portion in a direction substantially perpendicular to the fiber axis, and fine holes are generated in the details.

At this time, a polyester containing an inorganic compound which is incompatible with the above-mentioned inorganic fine particles and the polyester other than the sulfonic acid compound used in the present invention to promote the generation of vacancies due to the alkali weight reduction is used as a thick yarn. If you do
Due to the alkali reduction, the slit-shaped grooves formed in the thick portion tend to be wide and deep, and the fine holes formed in the details tend to be large in number and deep.

In the case of the sulfonic acid compound used in the present invention, the shape of the alkali weight reduction trace formed on the thick part is different from those of these fine pore forming agents. Similar to the thick portion in the case where the micropore-forming agent is not contained, a slit groove is formed in a direction substantially perpendicular to the fiber axis, but a typical difference is that a large number of large holes are generated. In the details, small micropores substantially equivalent to other micropore forming agents are formed.

The peculiar caustic behavior that occurs only in thick thin yarn of a polyester containing sulfonic acid compound used in the present invention, strong -SO ₃ the compound polar ^- has M ⁺ a (sulfonic acid metal salt) It is presumed that strong ionic crosslinking force acts between the adjacent sulfonic acid compounds.

When the undrawn yarn is drawn non-uniformly, the ionic cross-linking force acts to weaken the drawing tension, and in the thick portion, the orientation crystallization is suppressed. Alkali weight loss, large pores are formed in the entire thick part, and in the details where the stretching is highly advanced, the ionic cross-linking force is overcome and the orientation crystallization is promoted. It is presumed that the same fine pores are formed.

On the other hand, in the case of a normal polyester thick or thin thread or a polyester thick or thin thread containing a fine pore-forming agent other than the sulfonic acid compound used in the present invention, even in the thick section, the fiber axis is too small. Large crystals with molecular chains arranged in a certain direction grow, and amorphous parts with few molecular chains between the crystals are preferentially reduced in alkali, so that slit grooves are formed in a direction substantially perpendicular to the fiber axis It is estimated to be.

As described above, in the polyester thick and thin yarn of the present invention, small shallow holes are formed in the details as in the case of the ordinary polyester thick and thin yarns, and the fine holes are formed in the thick portions in the fine holes. A relatively large deep hole is formed. Therefore, the incident light is less scattered or absorbed by holes on the detailed surface, and the specular reflection ratio is large, whereas the incident light is scattered and absorbed by the holes on the thick surface Therefore, the image is opaquely spread and viewed in the thickness direction, and the thickness is visually recognized and emphasized. Also, if the color is not light, such as white or cream, that is, if it is dyed dark, the effect of thickening and thinning together with the effect of lightening and thickening will soften the darkness of the thick part and lighten the details. The difference between this and the above is reduced, and a mildly polished appearance can be obtained.

On the other hand, a slit groove formed regularly in a direction substantially perpendicular to the fiber axis does not have the effect of scattering or absorbing incident light in all directions. Neither the effect of visually enhancing the thick feeling nor the effect of reducing the difference in light and dark dyeing of dark color spot dyeing can be obtained.

The polyester in the present invention refers to terephthalic acid as a main acid component and is derived from alkylene glycols having 2 to 6 carbon atoms, ie, ethylene glycol, trimethylene glycol, tetramethylene glycol, pentamethylene glycol, and hexamethylene glycol. Particularly preferably, a polyester mainly comprising at least one glycol selected from ethylene glycol and tetramethylene glycol as a main glycol component is used. Further, a polyester in which part of the terephthalic acid component is replaced with another bifunctional carboxylic acid component may be used,
And / or a polyester in which a part of the glycol component is replaced by a diol component other than the above glycol. Examples of the bifunctional carboxylic acid other than terephthalic acid used herein include, for example, isophthalic acid, naphthalenedicarboxylic acid, diphenyldicarboxylic acid, diphenoxyethanedicarboxylic acid, β-adipic acid, sebacic acid,
Aromatic, aliphatic and alicyclic bifunctional carboxylic acids such as 1,4-cyclohexanedicarboxylic acid can be mentioned. Examples of the compound other than the above glycol include aliphatic, alicyclic, and aromatic diol compounds such as cyclohexane-1,4-dimethanol, neopentyl glycol, bisphenol A, and bisphenol S.

The polyester may be synthesized by any method. For example, when describing polyethylene terephthalate, usually, terephthalic acid and ethylene glycol are directly subjected to an esterification reaction, a lower alkyl ester of terephthalic acid such as dimethyl terephthalate is subjected to a transesterification reaction with ethylene glycol, or terephthalic acid and A first stage reaction of reacting with ethylene oxide to form a glycol ester of terephthalic acid and / or a lower polymer thereof;
It is produced by a second stage reaction in which the first stage reactive product is heated under reduced pressure to cause a polycondensation reaction until a desired degree of polymerization is reached.

The thick yarn obtained by the method of the present invention may contain, if necessary, optional additives such as a catalyst, a coloring inhibitor, a heat-resistant agent, a flame retardant, a fluorescent brightener, a matting agent, and a coloring agent. And inorganic particles.

Further, the cross-sectional shape of the thick and thin yarn of the present invention is as follows:
Whether it's a round cross section or an irregular cross section (triangle, square, star, etc.)
It may be hollow or any shape, but in order to make dry touch more effective, it is preferable to have an irregular cross section. The polyester thick and thin yarn of the present invention may be used alone to form a fabric, or may be used in combination with other yarns to form a fabric.

When it is desired to give a swelling feeling to the fabric, the thick yarn is mixed with a polyester multifilament yarn having a boiling water shrinkage higher than the boiling shrinkage of the thick thin yarn to form a composite. It is good to use as a mixed fiber.

As the polyester multifilament yarn having a high boiling water shrinkage, a non-heat set yarn or a low temperature heat set yarn having a boiling water shrinkage in the range of 15 to 80% is suitable. 15 to 8 according to the swelling required for the fabric
It may be selected from the range of 0%, but if it is less than 15%, the swelling will be insufficient, and if it exceeds 80%, the shape may become a problem when it is made into clothes.

Further, as the polyester multifilament yarn having a high boiling water shrinkage rate, a polyester obtained by copolymerizing isophthalic acid, bisphenol A or the like is also suitable in addition to a polyester made of polyethylene terephthalate.

As the compounding method, an air-blended fiber or a twisted yarn using an interlace nozzle or a Taslan nozzle is suitable. Among them, the interlaced fiber is more preferable in terms of productivity and yarn handling.

The interlace blending is performed by arranging two yarns or overfeeding thick and thin yarns by 0.5 to 5%, blending under a compressed air pressure of 0.5 to 5 kg / cm ² , and 20 to 120 yarns / m2.
It is preferable to impart confounding of

The thick or thin yarn of the present invention may be used without twist, or may be used by twisting. In the case of twisting, when the number of twists is in the range of the following formula, the yarn is tightened more in the details than in the thick portion of the thick and thin yarn, and the visual effect of the thick and thin is emphasized. 5500 / √De ≦ T ≦ 27000 / √De where De is the fineness (denier) of the yarn, and T is the number of twists (T
/ M). When the number of twists is 5500 / √De or less, the effect of emphasizing thick and thin is small. When the number of twists exceeds 27000 / √De, the thick portion is also tightened, and the effect of emphasizing the thick and thin ratio is reduced.

In the present invention, the knitted and woven polyester thick yarn must be subjected to alkali weight reduction treatment. Examples of the alkali compound used in the alkali weight reduction treatment include sodium hydroxide, potassium hydroxide, tetraammonium hydroxide, sodium carbonate, potassium carbonate, and the like. Among them, sodium hydroxide and potassium hydroxide are particularly preferably used.

The alkali weight reduction treatment varies depending on the type of alkali compound, but the concentration of the aqueous alkali solution is 0.1 to 0.1%.
30% by weight, the processing temperature is from room temperature to 100 ° C., preferably 7
The reaction is carried out under the conditions of 0 to 100 ° C. and a treatment time of 10 minutes to 4 hours, preferably 30 to 90 minutes. Further, in the alkali weight reduction treatment of the present invention, it is necessary to perform the treatment so that the weight loss rate is 5% by weight or more. On the other hand, the weight loss rate was set to 4 so that the strength of the thick and thin yarn after the alkali weight loss would not be able to withstand actual wear.
It is preferable that the content be 0% by weight or less.

After weaving using the polyester thick or thin mixed yarn of the present invention for warp and / or weft,
In the woven fabric that has been subjected to alkali weight reduction, large holes are formed on the surface of the thick portion of the thick and thin yarns as compared with the holes formed on the detailed surface, and the thickness ratio of the yarn is reduced. In addition, light scattering and absorption are larger on the surface of large holes than on the surface of small holes, and the phenomenon that the yarn appears visually thicker is added. As a result, a spanned appearance fabric having a slab-like span appearance is obtained.

[0064]

[Example 1] 197 parts of dimethyl terephthalate, ethylene glycol 1
24 parts, sodium 3-carbomethoxybenzenesulfonate
Na-5-carboxylate 4 parts (1.3 mol% based on dimethyl terephthalate), calcium acetate monohydrate 0.1 part
After performing a transesterification reaction of 118 parts according to a conventional method, 0.112 of trimethyl phosphate was used as a stabilizer.
Parts, and 0.079 part of antimony trioxide as a polymerization catalyst, and the polymerization reaction was terminated according to a conventional method to obtain chips.
The intrinsic viscosity of the resulting modified polyester was 0.640.

The obtained modified polymer was spun at 2000 m / min to obtain an undrawn yarn of 220 De / 36 fil.
Next, after preheating this undrawn yarn with a hot roller at 50 ° C., it is drawn at a drawing ratio of 0.5 times the natural drawing ratio,
Heat set with 180 ° C heating plate, 90De / 3
It was wound up as a 6-fil thick thread. The thickness ratio of the obtained thick and thin yarn is H (thick portion) / H (detail) = 2.0, and the ratio of the length of the thick portion to the length of the fine portion is W (detail) / W (thickness). Part)
= 4.5.

Using this thick and thin yarn as the weft, 64
After woven into a flat structure at an inch density, the resulting woven fabric is scoured, relaxed, and set according to a conventional method.
g / 1 aqueous solution at 98 ° C. for 30 minutes in an aqueous solution to give a 20% weight-reduced fabric.

Next, this weight-loss climbing fabric is divided into two equal parts,
One was a woven fabric without dye and the other was a dark blue dyed fabric. At that time, the resulting woven fabric was passed through the same process as dyeing at 130 ° C. for 45 minutes without a dye to produce a feeling. The dyed fabric is C.I.
I. After dyeing with Disperse Blue 79.4% at 130 ° C. for 45 minutes, the resultant was reduced and washed according to a conventional method to obtain a dark blue fabric.

The thickness of the obtained woven fabric was visually evaluated. In the resulting woven fabric, the opaque, whiter, and thicker portion of the woven fabric, which is made up of the details of thick and thin yarns, is clearly opaque and thicker. The texture of the fabric was unique and the sliminess unique to the synthetic fiber was eliminated, and the fabric was smooth and had a dry touch.

Similarly, even in the dark blue dyed woven fabric, the thick portion can be clearly seen with respect to the ground portion, and the shading difference between the thick portion and the details is smaller than that of the conventional thick and thin yarn fabric. Is a woven fabric that has been removed from the unique sliminess of synthetic fiber and has a dry touch.

The surfaces of these two fabrics were enlarged by a scanning electron microscope, and the size of pores formed in the thick and fine fiber surfaces was measured. The average diameter of the holes is L (detail) = 0.
5, L (thick part) = 2.5, and for details,
Large pores were observed in the thick part.

[Comparative Example 1] Instead of Na-3-carbomethoxy benzenesulfonate-5-carboxylate, RSO ₃ Na (R is 14 carbon atoms)
(Alkyl group) was added in the same manner as in Example 1 except that 0.6% by weight (based on dimethyl terephthalate) was added at the end of the polymerization reaction. The thick / thin ratio of the thick yarn obtained as a result is H (thick portion) / H (detail) = 2.0 similarly to the thick and thin yarn of Example 1.
However, the size of the hole is L (details) = 0.5 and L
(Thick part) = 0.6, there was almost no difference in size between the two, and no thick and thin effect was observed in the white formed fabric.

[Comparative Example 2] 2.5% by weight (based on dimethyl terephthalate) of TiO ₂ was added instead of Na-3-carbomethoxybenzenebenzenesulfonate-5-carboxylate at the end of the transesterification reaction. Other than that, it carried out similarly to Example 1. The thick-thin ratio of the thick yarn obtained as a result is H
(Thick part) / H (detail) = 2.0, but the size of the hole is L (detail) = 0.5 and L (thick part) = 0.6,
There was almost no difference in size between the two, and the thick portion had a slit-like groove in a direction substantially perpendicular to the fiber. No thickening effect was observed in the white woven fabric.

[Example 2] Polyester filament obtained in Example 1 (fineness 90 denier / 36 filaments, polyester filament obtained by copolymerizing 10 mol% of isophthalic acid with boiling water shrinkage (10%) (fineness 50 denier / 12 filaments, boiling water shrinkage 3
0%) and mixed using an interlace nozzle to obtain a mixed fiber of 140 denier / 48 filaments. This was woven in a flat structure, and the obtained woven fabric was scoured, relaxed and set according to a conventional method.
/ 1 aqueous solution at 98 ° C for 30 minutes,
A 20% weight loss fabric was obtained.

Next, this weight-loss climbing fabric is divided into two equal parts,
One was a woven fabric without dye and the other was a dark blue dyed fabric. At that time, the resulting woven fabric was passed through the same process as dyeing at 130 ° C. for 45 minutes without a dye to produce a feeling. The dyed fabric is C.I.
I. Using 4% of Disperse Blue 79,
After dyeing at 130 ° C. for 45 minutes, the mixture was reduced and washed according to a conventional method to obtain a dark blue fabric. The thickness of the obtained woven fabric was visually evaluated. In the resulting woven fabric, the opaque, whiter, and thicker portion of the woven fabric, which is made up of the details of thick and thin yarns, is clearly opaque and thicker. The texture of the fabric was unique and the sliminess unique to the synthetic fiber was eliminated, and the fabric was smooth and had a dry touch.

Similarly, even in the dark blue dyed fabric, the thick portion can be clearly seen with respect to the ground portion, and the difference in shading between the thick portion and the details is smaller than that of the conventional thick and thin yarn fabric. Is a woven fabric that has been removed from the unique sliminess of synthetic fiber and has a dry touch.

The surfaces of these two woven fabrics were enlarged by a scanning electron microscope, and the size of pores formed in the thick and fine fiber surfaces of the thick and thin yarns constituting the mixed yarn was measured. The average diameter of the holes is L (detail) = 0.5, while L (thick)
= 2.5, and a large hole was recognized in the thick part with respect to the details.

[0077]

According to the present invention, it is possible to visually improve the thick and thin feeling of polyester thick and thin yarns, and it is difficult to express the feeling of thick and thin with conventional polyester thick and thin yarns. Can provide a polyester thick and thin yarn capable of expressing a thick and thin feeling.

[Brief description of the drawings]

FIG. 1 is a schematic side view of a thick and thin thread of the present invention.

FIG. 2 is a schematic side view of a filament made of the thick and thin yarn of the present invention.

FIG. 3 is a schematic side view of a filament formed from a thick and thin yarn of a comparative example.

[Explanation of Signs] 1: Thick portion of thick and fine yarn 2: Detail of thick and thin yarn 3, 3 ', 3 ": Filament constituting filament of thick portion 4, 4', 4": Filament of constituting fine portion 5: Thick and thin yarn Thick portion of filament 6: Detail of thick filament 7: Void of thick portion 8: Void of detail 9: Thick portion of thick filament 10: Detail of thick filament 11: Slit groove 12: Thick Hole 13: detail hole

────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI D06M 101: 32 D06M 5/02 B (56) References JP-A-61-63711 (JP, A) JP-A-62-85073 ( JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) D01F 6/62 301-308 D01F 6/84 305-311 D01F 6/84 305-6/92 309 D06M 11/38

Claims (2)

(57) [Claims] 1. A compound of the general formula (Where Y is a hydrogen atom or an ester-forming functional group, M
₁ and M ₂ are metal, n represents relative bifunctional carboxylic acid component constituting the polyester of at least one acid compound represented by the 1 or 2) 0.3 to 15
It is a thick and thin polyester multifilament yarn composed of polyester contained in the range of mol%, and has a pore having a pore diameter (L: μm) satisfying the following on each of a thick surface and a fine surface. Polyester thick and thin yarn. 0.1 ≦ L (details) ≦ 1.0 1.5 ≦ L (thick) ≦ 4.0 2. A compound of the general formula (Where Y is a hydrogen atom or an ester-forming functional group, M
₁ and M ₂ are metal, n represents relative bifunctional carboxylic acid component constituting the polyester of at least one acid compound represented by the 1 or 2) 0.3 to 15
The polyester contained in the range of mol% is melt-spun at a spinning speed of 1,000 to 4,000 m / min, and the obtained undrawn yarn is drawn at a temperature of 15 to 85 ° C and drawn. The non-uniform stretching is performed at a draw ratio of 0.3 to 0.85 times the natural draw ratio, and the obtained non-uniform drawn yarn is formed into a woven or knitted fabric, and then alkali-reduced in a weight loss rate of 5 to 40%. Characteristic method for producing polyester thick and thin yarn.