JPH0978449A - Production of silky high density web - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain the silky high density web rich in a creaking touch, tensional stiffness and a repelling touch and good in surface quality by using blended and interlaced yarns comprising low shrinkable polyester conjugate fibers and highly shrinkable polyester fibers. SOLUTION: Conjugated fibers wherein the plural grooves of each fiber comprising a polyester component A, having a multi-lobar cross section having three or more projections, and a boiling water shrinkage degree of <=15%, having the projections continued in the axial direction of the fiber in a total number N represented by the inequality: 9<=N<=25, and further having groove depths Hμm satisfying the inequality: 0.1<=H<=8 are filled with a polyester component B having a larger alkali solubility than that of the component A are interlaced with highly shrinkable fibers comprising a polyester component C lower in alkali solubility than that of the low shrinkable conjugated fiber component B and having a hot water shrinkage of 20%, a peak temperature of >=100 deg.C and the maximum thermal stress value of >=0.4g/dl in an interlacing degree of 20-80 points/m. A web containing the blended yarns in an amount of at least 40wt.% is produced, subjected to the elusion of the component B and subsequently treated with hot water to give the silky high density 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 silky high density fabric using entangled yarns composed of polyester-based composite fibers and polyester-based non-composite fibers, and particularly to a unique squeaky feeling, desired tension and waist and The present invention relates to a method for producing a silky-tone high-density fabric having a repulsive feeling and a good surface quality.

[0002]

2. Description of the Related Art Conventionally, synthetic fiber multifilament yarns such as polyester multifilament yarns have been used,
Various methods for obtaining a silky woven or knitted fabric have been studied.
For example, a woven or knitted fabric is known in which the cross-section of a polyester filament has a modified cross-section such as a triangular shape or a V-shape to give a silky elegant luster. In addition, Japanese Patent Laid-Open No. 2-1
In Japanese Patent No. 12434, a high shrinkage polyester filament having a modified cross section and a low shrinkage polyester filament having a modified cross section are mixed to give a silky elegant luster, and a tension caused by shrinkage of the high shrinkage polyester filament is provided. Woven and knitted fabrics that give waist are also known.

However, the woven and knitted fabrics obtained by any of the conventional methods do not give the peculiar squeaky feeling of the silk woven and knitted fabrics. The reason for this is that even when using a polyester filament whose cross section is irregular, the contact with the skin (skin) is smooth, and the contact between the polyester filaments is also smooth, so the objects rub against each other. This is because the squeaky feeling cannot be obtained.

[0004]

Therefore, the present inventors have found that the contact with the skin is smooth because the polyester filaments constituting the woven or knitted fabric have a modified cross section. Moreover, it was examined whether the contact between filaments was smooth. As a result, it turned out to be a manufacturing reason for polyester filaments. That is, when a polyester filament is produced by a melt-spinning method using a nozzle having a triangular or V-shaped spinning hole, the polyester flows even after spinning to maximize its surface area, and as a result, the obtained The apex of the triangular or V-shaped polyester filament is
This is because it has a smooth surface with roundness.

Therefore, the inventors of the present invention used polyester filaments having a modified cross section obtained by the melt spinning method to weave and knit to obtain a fabric, and then provided groove portions at the respective vertexes of the polyester filaments to form the respective vertexes. It was attempted to reduce the smoothness of the fabric and obtain a squeaky feeling peculiar to the silk woven fabric. The concrete means of this trial is Japanese Patent Application No. 6-34.
Invention related to No. 0426 (hereinafter referred to as "prior invention")
Has been disclosed as. That is, a polyester-based composite fiber (filament) having a multi-lobed cross section, which is originally composed of a fiber main body having a groove at each apex and a soluble component filling the groove, is used to obtain a dough, and then a soluble component is added. It has been disclosed that the squeaky feeling peculiar to the silk woven or knitted fabric is obtained by removing it. Further, by using high shrinkability and low shrinkage as the polyester-based composite fiber (filament), it is possible to improve the squeaky feeling and to give the obtained woven or knitted fabric tension and elasticity. It has been disclosed to obtain a woven or knitted product exhibiting a silky tone. The present invention
The invention is a related invention of the prior invention, and uses a specific polyester-based highly shrinkable non-conjugated fiber in place of the polyester-based highly shrinkable conjugate fiber used in the earlier applied invention. By using high-shrinkable non-composite fibers instead of high-shrinkable composite fibers, the obtained knitted fabric or the like can be further densified, and the desired tension, waist, and rebound can be obtained for this cloth. It is to give a feeling.

[0006]

Means for Solving the Problems That is, the present invention comprises a polyester-based component A, which has a multi-lobed cross-section having three or more convex portions and a hot water shrinkage of 15% or less. Around the apex of all the convex portions of the fiber body X, a plurality of groove portions that continuously exist in the fiber axis direction and that satisfy the following formulas (1) and (2) are formed. A low-shrinkage composite fiber filled with a polyester component B having a higher alkali solubility than A and a polyester component C having a lower alkali solubility than the polyester component B, and having a hot water shrinkage of 20% or more. And a high shrinkage non-composite fiber having a peak temperature of 100 ° C. or higher and a maximum thermal stress value of 0.4 g / d or higher are entangled at a number of 20 to 80 entangles / m and mixed fiber entanglement Weaving and knitting using yarns and mixing After obtaining a fabric containing at least 40% by weight of yarn, the fabric is subjected to alkali weight reduction treatment to dissolve and remove the polyester component B present in the low-shrinkage composite fiber, and to obtain the fiber body X. After generating it,
The high-shrinkable non-composite fiber is subjected to hot water treatment, and the fiber body X
The present invention relates to a method for producing a silky-tone high-density fabric, which is characterized by exhibiting higher shrinkability. 9 ≦ N ≦ 25 (1) 0.1 μm ≦ H ≦ 8 μm (2) (where N is the total number of grooves in all convex portions, and H is the depth of each groove). )

First, in the present invention, a low shrinkage composite fiber and a high shrinkage non-composite fiber are prepared. The low-shrinkage conjugate fiber is a composite of a fiber body X made of the polyester component A and a polyester component B having a higher alkali solubility than the polyester component A.
The fiber body X has a multi-lobed cross-sectional shape having a convex portion in its cross section, and is provided with a groove portion continuously existing in the fiber axis direction near the apex of the convex portion. Then, the polyester-based component B is compounded with the fiber main body X in a state of being filled in this groove portion to form a low-shrinkage composite fiber.

It is necessary that the fiber main body X having a multi-lobed cross-section has three or more convex portions. This convex part is 3
When the number is less than the number, it is difficult to give a silky-like squeaky feeling and elegant luster to the obtained fabric, which is not preferable. Moreover, the total number of the groove portions formed in the convex portions of the fiber body X is 9 to 25 in all the convex portions. When the number of the groove portions is less than 9, it is difficult to impart a silky squeaky feeling to the obtained fabric, which is not preferable. On the other hand, this groove is 25
When it exceeds, a large number of groove portions will be formed at one apex, the interval between adjacent groove portions will be narrowed, and the fold-like portion formed of the polyester-based component A between the groove portions is likely to be lost, It is not preferable because the grooves may disappear and the silky squeaky feeling may decrease. Further, the depth of the groove formed in the fiber body X is 0.1 to 8 μm.
It is. When the depth of the groove is less than 0.1 μm, it is difficult to impart a silky squeaky feeling to the obtained fabric, which is not preferable. On the other hand, if the depth of the groove exceeds 8 μm, the bottoms of the adjacent grooves may be connected, and the folds formed of the polyester component A between the grooves are likely to fall off, resulting in a silky tone. It is not preferable because it may reduce the squeaky feeling. The groove portion formed in the fiber body X in the above-described form is substantially continuous in the fiber axis direction. If the groove portions are not continuous in the fiber axis direction and are in a discontinuous state, there may be a portion where the groove portions do not exist partially, and the squeaky feel of the silky tone may decrease, which is not preferable.

The hot water shrinkage of such a fiber body X is 15
% Or less. When the hot water shrinkage ratio exceeds 15%, the fiber body X shrinks greatly together with the highly shrinkable non-composite fiber, and the fiber body X does not become dense on the surface of the fabric, and the silky feel and squeaky feeling deteriorate. Therefore, it is not preferable. In addition,
The hot water shrinkage rate referred to in the present invention is measured by the following method. That is, a sample having an arbitrary length L ₀ was prepared, this sample was treated in boiling water at 100 ° C. for 30 minutes in a non-strained state, and the length L ₁ of the treated sample was measured, [( L ₀
It is calculated by the formula −L ₁ ) / L ₀ ] × 100. However, when measuring the length of the sample, a load of (denier of sample) × (1/30) g is applied.

As the polyester-based component A forming the fiber main body X, any one can be adopted as long as it is relatively less soluble in alkali as compared with the polyester-based component B. For example, polyethylene terephthalate obtained by condensing ethylene glycol and terephthalic acid, or a copolyester having 90% or more of ethylene glycol and terephthalic acid and a part of which is another diol component or another acid component is used. be able to.

The polyester-based component B filled in the groove formed in the fiber body X is more easily dissolved in alkali than the polyester-based component A (has a large alkali solubility). Any) can be adopted. For example, a copolyester obtained by copolymerizing 1 to 5 mol% of sodium sulfoisophthalic acid, 10 to 30 wt% of polyalkylene glycol, and a conventionally used diol component and acid component can be adopted. .

An example of the cross-sectional shape of the low-shrinkage conjugate fiber used in the present invention is the shape shown in FIGS. 1 and 2. That is, the fiber main body X formed of the polyester-based component A has three convex portions 1 and five groove portions 2 ′ are formed near the apex of each convex portion, a total of 15 groove portions 2 ′. There is. The groove portions 2'are continuous in the fiber axis direction, and each groove portion 2'has a filler 2 made of a polyester-based component B having high alkali solubility.
Is filled. Such a composite fiber can be easily obtained by melt-spinning the polyester-based component A and the polyester-based component B using a specially shaped spinning hole. Then, when the filling body 2 is dissolved and removed by the alkali reduction treatment, as shown in FIG. 2, the fiber main body X in which the groove portion 2'is revealed is generated.

Next, the highly shrinkable non-composite fiber used in the present invention is a one-component non-composite fiber comprising the polyester component C. The cross section of the non-composite fiber is generally circular, but rarely may be triangular, elliptical, eyebrows, or the like. The polyester-based component C must have a lower alkali solubility than the polyester-based component B forming the low shrinkage conjugate fiber. When the alkali solubility of the polyester component C is equal to or higher than the alkali solubility of the polyester component B, a large amount of highly shrinkable non-composite fibers are dissolved and removed during the alkali weight reduction treatment, This is not preferable because it is difficult to obtain the desired high-density fabric. As the polyester-based component C, any one can be used as long as it has a lower alkali solubility than the polyester-based component B. For example, the polyester-based component forming the fiber main body X of the low-shrinkage composite fiber. The same composition as A may be used, or a terpolymer polyester of ethylene glycol, terephthalic acid and isophthalic acid may be used. In particular, in order to achieve the prescribed hot water shrinkage rate, peak temperature, and maximum thermal stress value, the total of ethylene glycol and terephthalic acid is 85 mol% or more, and isophthalic acid is 1
It is preferable to use a terpolymer polyester of 5 mol% or less.

The hot water shrinkage ratio of this highly shrinkable non-composite fiber is
It is 20% or more. When the hot water shrinkage is less than 20%,
The shrinkage of the fabric in the hot water treatment step is small, the obtained fabric does not have a high density, and desired tension and stiffness cannot be imparted, which is not preferable. In addition, the difference in shrinkage ratio between the fiber main body X forming the low-shrinkable conjugate fiber and the fiber main body X is less likely to be unevenly distributed or dense on the surface of the obtained fabric, and the fabric has a silky tone. It is not preferable because it makes it difficult to give a touch or a squeaky feeling. The hot water shrinkage rate of the highly shrinkable non-composite fiber is measured by the same method as the hot water shrinkage rate of the fiber body X.

Further, the peak temperature of the hot water shrinkage ratio of the highly shrinkable non-composite fiber must be 100 ° C. or higher. If the peak temperature is less than 100 ° C, shrinkage may occur at a low temperature, and shrinkage may occur in processes other than the hot water treatment process, such as the weaving / weaving process and the dyeing process. The characteristics of the mixed entangled entangled yarn (characteristics such as homogeneity and tensile strength) deteriorate, or wrinkles easily occur in the obtained fabric, which is not preferable. The peak temperature of the hot water shrinkage is the temperature when the hot water shrinkage shows the maximum value, and in the same manner as the method for measuring the hot water shrinkage described above, only the treatment temperature is variously changed, It is measured by detecting the temperature at which the shrinkage ratio shows the maximum value.

Furthermore, the maximum thermal stress value of the highly shrinkable non-composite fiber must be 0.4 g / d or more. When the maximum thermal stress value is less than 0.4 g / d, the fabric cannot be given sufficient shrinkage behavior in the hot water treatment step, the obtained fabric is difficult to be densified, and the obtained fabric has good tension.・ It is not preferable because it is difficult to give the waist. In addition,
The maximum thermal stress value is measured by the following method. That is, using a commercially available dry heat shrinkage stress measuring instrument, the sample was formed into a ring having a diameter of 15 cm, its initial tension was set to 60 mg / d, and the temperature was raised under the condition of a temperature rising rate of 300 ° C./60 seconds, The maximum stress value developed at that time is measured, and this value is taken as the maximum thermal stress value.

The highly shrinkable non-composite fiber used in the present invention must satisfy all of the above-mentioned conditions of the hot water shrinkage rate, its peak temperature condition and the maximum thermal stress value condition. I won't. That is, of these three conditions
If even one of them does not satisfy the predetermined condition, it is not possible to increase the density of the cloth as the object of the present invention, or
It becomes impossible to give desired tension, waist and repulsion to the cloth. For example, even if the high-shrinkable non-composite fiber has a hot water shrinkage of 40%, if the maximum thermal stress value is less than 0.4 g / d, the dough exhibits sufficient shrinkage behavior in the hot water treatment step. Cannot be obtained, and it becomes difficult to obtain a desired fabric having tension and elasticity. The maximum thermal stress value is 0.4 g /
If the hot water shrinkage is less than 20% even if d or more,
As in the case described above, it is not possible to give the cloth a sufficient shrinkage behavior, and it becomes difficult to obtain a cloth having a desired tension and elasticity.

The low-shrinkage composite fiber and the high-shrinkage non-composite fiber prepared as described above are mixed and entangled to obtain a mixed fiber entangled yarn. As a means for mixing and entanglement, any method can be used as long as it is a conventionally known method. In particular, the fluid entanglement treatment using a commercially available interlacer is optimal. Here, the number of interlaced mixed entangled yarns is 20 to 80 pieces / m.
It is preferred that When the number of entanglements is less than 20 / m, the low-shrinkage composite fiber and the high-shrinkage non-composite fiber are likely to be separated, and both fibers may be separated in the weaving and weaving process. If both fibers are separated, troubles are likely to occur during the weaving and weaving process, and the rise and slack of the fiber body X on the fabric surface due to the difference in hot water shrinkage is not sufficient, and the silky feel is felt. It is not preferable because it is difficult to obtain a squeaky feeling. When the number of entanglements exceeds 80 / m, entanglement is conspicuous in the obtained fabric, and the appearance is
Product value may be reduced. At this time, the weight ratio of the low-shrinkage composite fiber and the high-shrinkage non-composite fiber in the mixed fiber entangled yarn is not particularly limited, but a high shrinkage ratio with respect to 100 parts by weight of the low-shrinkage composite fiber. 8 non-composite fibers
It is preferably from 0 to 120 parts by weight. When the amount of the highly shrinkable non-composite fiber is less than 80 parts by weight, the amount of the highly shrinkable non-composite fiber having a relatively large shrinkage becomes small, the tension and stiffness of the obtained fabric are lowered, and it is difficult to achieve the high density of the fabric. A tendency arises. On the other hand, when the highly shrinkable non-composite fiber exceeds 120 parts by weight, the fiber main body X having relatively little shrinkage after the hot water treatment is reduced, and the silky texture imparted to the obtained fabric as a whole is obtained. It tends to decline.

This mixed fiber entangled yarn is knitted and woven to obtain a cloth.
As a weaving structure and a knitting structure at the time of knitting and knitting, any conventionally known structure can be adopted. At this time, 40% by weight or more of the mixed fiber entangled yarn is contained in the dough. When the content of the mixed fiber entangled yarn is less than 40% by weight, the silky texture, which is the object of the present invention, is deteriorated, or the tension and stiffness of the fabric are insufficient, which is not preferable. When a fabric is obtained by using a mixed entangled yarn and another yarn, for example, a mixed entangled yarn may be used as a warp and a weft of another yarn to obtain a fabric. The cloth may be obtained by using the intertwined yarn as the weft yarn and the other yarn as the warp yarn. Further, a yarn obtained by aligning the mixed fiber entangled yarn and another yarn may be used as a warp and / or a weft to obtain a fabric. As the other thread, a thread generally used conventionally may be used, and for example, regular polyester thread or the like is preferably used.

Next, the dough is subjected to alkali reduction treatment. The alkali weight reduction treatment can employ a conventionally known method, for example, by immersing the dough in an aqueous solution adjusted to be alkaline. By this alkali weight reduction treatment, the filler (that is, the polyester-based component B having a large alkali solubility) in the low-shrinkage composite fiber constituting the mixed fiber entangled yarn is dissolved and removed, and three or more convex portions are formed. That is, the fiber main body X having a multi-lobed cross-sectional shape and having a plurality of grooves formed near the apex of the convex portion is generated.

Next, the fabric which has been subjected to the alkali weight reduction treatment is subjected to a hot water treatment so that the fiber main body X and the highly shrinkable non-composite fiber are caused to contract. The hot water treatment is performed by spraying heated steam onto the dough, or by passing the dough into boiling water. Particularly, in the dyeing and finishing step, since the dyeing or finishing is generally performed with hot water, it is preferable to carry out the hot water treatment together with the dyeing or finishing, because it is not necessary to add a separate hot water treatment step. In the hot water treatment, it is generally most preferable to adopt a means that maximizes the shrinkage force of the highly shrinkable non-composite fiber without applying tension to the fabric. Specifically, 80-130 ℃
In the bath of, beating, spraying or rubbing,
Most preferably, it promotes the shrinkage of the highly shrinkable non-composite fiber. By this hot water treatment, the fiber body X has a lower hot water shrinkage rate than the highly shrinkable non-composite fiber, so that the fiber body X floats or sags in the mixed fiber entangled yarn, and squeaks with the skin or between the fiber bodies X. The squeaky feeling comes to be exhibited well. On the other hand, since the high shrinkage non-composite fiber has a large hot water shrinkage ratio, it is unevenly distributed inside the fabric, which gives the woven or knitted fabric a desired tension and stiffness and densifies the knitted fabric itself. . By the method as described above, it is possible to obtain a silky high-density fabric which exhibits the squeaky feeling and the elegant luster, which is the object of the present invention, and has a desired tension and waist.

[0022]

EXAMPLES Next, the present invention will be specifically described by way of examples. In addition, each physical property and evaluation in an Example were performed with the following method. (1) Relative viscosity It was measured at a concentration of 0.5 g / dl and a temperature of 20 ° C. using an equal weight mixed solvent of phenol and ethane tetrachloride. (2) Depth of groove and number thereof Grooves are knitted using a yarn made of polyester-based composite fiber to be measured, and alkali weight reduction treatment is performed under the conditions of NaOH concentration 0.5%, treatment temperature 95 ° C., treatment time 30 minutes. Then, the easily soluble component was completely removed. Next, the washed and dried tubular knitted fabric is unknitted, and the modified cross-section fibers that make up the obtained yarn are photographed with a scanning electron microscope, and the depth of the groove is measured on the photograph, and I counted the number. (3) Feeling evaluation (Evaluation of silky squeaky feeling, tension / waist, and surface quality) Ten panelists consisting of weaving engineers, knitting engineers, and dyeing engineers were selected to feel the touch and appearance. The inspection was performed according to the following four-level evaluation. ◎: Very good, ○:
Good, Δ: somewhat inferior, ×: inferior.

Example 1 As the polyester component A, polyethylene terephthalate having a relative viscosity of 1.38 was prepared. On the other hand, as the polyester-based component B, 12% by weight of polyethylene glycol having a molecular weight of 7,000 and 1.5 mol% of 5-sodium sulfoisophthalic acid were copolymerized with ethylene glycol and terephthalic acid, and the relative viscosity was 1.55. A copolyester was prepared. Using 6 parts by weight of this polyethylene terephthalate and 1 part by weight of the copolyester, melt-composite spinning is carried out so that the polyethylene terephthalate forms the fiber main body X and the copolyester forms the filler. An unstretched polyester filament having a cross section as shown was obtained. This unstretched polyester filament is then introduced into the stretching process,
A low shrinkage composite fiber yarn of denier / 24 filament was obtained. The polyester filament (low shrinkage composite fiber) No. The cross-sectional shape of 1 L, the total number of the groove portions, the depth of the groove portions, and the hot water shrinkage ratio of the fiber body X are as shown in Table 1.

[0024]

[Table 1]

As the polyester component C, a terpolymer polyester prepared by copolymerizing ethylene glycol, terephthalic acid and isophthalic acid was prepared. Then, this polyester component C was melt-spun by a usual method and then stretched to obtain a high-shrinkable non-composite fiber yarn of 30 denier / 12 filaments. The polyester filaments (highly shrinkable non-composite fibers) No. The cross-sectional shape of 1H is circular, and the hot water shrinkage ratio is
Table 2 shows the hot water shrinkage peak temperature and maximum thermal stress value.

[0026]

[Table 2]

Next, using the low shrinkage composite fiber yarn and the high shrinkage non-composite fiber yarn prepared above, both yarns are mixed and entangled with a commercially available interlace nozzle, and the number of entanglement is 55 / m mixed fiber entangled yarn was obtained. This mixed fiber entangled yarn is used for warp and weft, and by the water jet loom,
A plain weave fabric was woven. This plain woven fabric is subjected to an alkali weight reduction treatment (caustic soda aqueous solution concentration 10 g / l, aqueous solution temperature 100 ° C., soaking time 30 minutes) to obtain a low shrinkage composite fiber in the mixed fiber entangled yarn. The polyester component B was dissolved and removed. After that, the polyester is dyed by a conventional method under the conditions of a temperature of 130 ° C. and a time of 30 minutes (also a hot water treatment), and then a final set (a hot water treatment) is performed at a temperature of 170 ° C. and a time of 1 minute. A silky high density fabric was obtained.

Example 2 The total number of groove portions and the depth of the groove portions are shown in Table 1. A low-shrinkage composite fiber yarn made of the same polyester filament as that used in Example 1 was prepared except that the values were 2L. Then, the low shrinkage conjugate fiber yarn and the high shrinkage non-composite fiber yarn used in Example 1 were mixed and entangled under the same conditions as in Example 1 to obtain a mixed entangled yarn.
A plain woven fabric was obtained under the same conditions as in Example 1, using the mixed entangled yarn as a warp and a yarn of 200 denier / 48 filament made of regular polyester filament having a circular cross section as a weft. The content of the mixed entangled yarn in this plain woven fabric was 55% by weight. Then, this plain woven fabric was subjected to alkali weight loss treatment, polyester dyeing and final set under the same conditions as in Example 1,
A silky high density fabric was obtained.

Example 3 The hot water shrinkage, the peak temperature and the maximum thermal stress value are N in Table 2.
o. A highly shrinkable non-composite fiber yarn made of the same polyester filament as that used in Example 1 was prepared except for the values shown in 3H. Then, the low shrinkage composite fiber yarn used in Example 1 and the high shrinkage non-composite fiber yarn are set to have an entanglement number of 30 / m.
Mixed fiber entanglement was performed in the same manner as above to obtain a mixed fiber entangled yarn. 75 denier / 36 composed of the regular polyester filament used in Example 2 with the mixed entangled yarn as the warp
A plain weave fabric was obtained under the same conditions as in Example 1, using the filament yarn as the weft yarn. The content of the mixed entangled yarn in this plain woven fabric was 70% by weight. Then, this plain woven fabric was subjected to alkali weight loss treatment, polyester dyeing and final set under the same conditions as in Example 1,
A silky high density fabric was obtained.

Example 4 The total number of groove portions, the depth of the groove portions and the hot water shrinkage ratio of the fiber body X are shown in Table 1. A low-shrinkage composite fiber yarn made of the same polyester filament as that used in Example 1 was prepared except that the values were as shown in 4L. Then, the low shrinkage conjugate fiber yarn and the high shrinkage non-composite fiber yarn used in Example 1 were mixed under the same conditions as in Example 1 except that the number of entanglements was 75 / m. It was entangled to obtain a mixed fiber entangled yarn. 200 denier / 4 consisting of regular polyester filament with circular cross section
A plain weave fabric was obtained under the same conditions as in Example 1, using a weft yarn of 8 filaments. The content of the mixed entangled yarn in this plain woven fabric was 55% by weight. Then, this plain woven fabric was subjected to alkali weight reduction treatment, polyester dyeing and final set under the same conditions as in Example 1 to obtain a silky high density fabric.

Comparative Example 1 No. 1 in Table 1 was obtained using only the polyester-based component A used in Example 1. As shown in FIG. 1C, a low-shrinkage non-composite fiber yarn consisting of a polyester filament having a multi-lobed cross-section and having only a fiber main body X and no groove was prepared. The low shrinkage non-composite fiber yarn and the high shrinkage non-composite fiber yarn used in Example 1 were entangled at 9
Entangled yarn was obtained by entanglement under the same conditions as in Example 1 except that the rate was 5 / m. Using this entangled yarn as a warp and a weft, a plain woven fabric was woven by a water jet loom, and the plain woven fabric was subjected to alkali reduction treatment, polyester dyeing and final set under the same conditions as in Example 1, A high density fabric was obtained.

Comparative Example 2 The hot water shrinkage, peak temperature and maximum thermal stress value are N in Table 2.
o. A highly shrinkable non-composite fiber yarn made of the same polyester filament as that used in Example 1 was prepared except for the values shown in 2D. Then, the low shrinkage composite fiber yarn used in Example 1 and the high shrinkage non-composite fiber yarn are set to 10 entangles / m, and
The entangled yarn was obtained by entanglement in the same manner as. This entangled yarn is used as a warp and a weft, and a plain woven fabric is woven by a water jet loom.
Alkali weight loss treatment, polyester dyeing and final set were performed under the same conditions as above to obtain a high density fabric.

Comparative Example 3 A plain weave fabric was used under the same conditions as in Example 1 except that the mixed fiber entangled yarn used in Example 1 was used as a weft yarn and a yarn of 200 denier / 48 filaments composed of regular polyester filaments having a circular cross section was used as a warp yarn. Got the dough. The content of the mixed entangled yarn in this plain woven fabric was 30% by weight.
Then, this plain woven fabric was subjected to alkali reduction treatment, polyester dyeing and final set under the same conditions as in Example 1 to obtain a high density fabric.

With respect to the fabrics obtained by the methods according to Examples 1 to 4 and Comparative Examples 1 to 3, the silky texture squeaky feeling, tension / waist, and surface quality were evaluated, and the results are shown in Table 3.
It was as shown in.

[Table 3]

As is clear from this result, Examples 1 to 1
The plain weave obtained by the method according to No. 4 has a squeaky feeling, tension,
It was a silky high density fabric with good waist and surface quality. In particular, the plain woven fabric according to Example 1 was a silky high-density fabric that was the most excellent in all of the squeaky feeling, tension, waist, and surface quality. On the other hand, the plain woven fabric according to Comparative Example 1 lacked the silky squeaky feeling because the low shrinkage non-composite fiber having no groove portion was used in the fiber body X. In addition, since the number of entanglements of the low shrinkage non-conjugated fiber and the high shrinkage non-conjugated fiber is too large, the surface quality was poor. The plain woven fabric according to Comparative Example 2 has a small hot water shrinkage ratio of the high shrinkage non-composite fiber and is equal to the hot water shrinkage ratio of the fiber body X of the low shrinkage composite fiber, and therefore lacks tension and waist. there were. Further, since the number of entanglements between the low-shrinkage conjugate fiber and the high-shrinkage non-conjugate fiber was too small, both fibers were easily separated, and a trouble was likely to occur during weaving. In the plain woven fabric according to Comparative Example 3, since the content of the mixed entangled yarn in which the low-shrinkage composite fiber and the high-shrinkage non-composite fiber are entangled and mixed in the fabric is too small, a silky squeaky feeling, It was also lacking in tension and waist.

[0036]

The cloth obtained by the method according to the present invention is composed of the fiber main body X and the non-composite fiber exhibiting high shrinkage. The fiber body X floats or sags in the cloth due to the high shrinkage of the non-composite fibers, and is unevenly distributed on the cloth surface. The fiber main body X has a multi-lobed cross-sectional shape, and since a predetermined number of groove portions having a predetermined depth are formed in the convex portion, catching of the groove portions or contact of the groove portions with the skin may occur. Gives a unique squeaky feeling. On the other hand, the non-composite fiber is unevenly distributed inside the fabric due to the high shrinkage. Since the non-composite fiber is composed only of the polyester component C having a low alkali solubility, it is difficult to be reduced and removed in a large amount by the alkali reduction treatment, and the non-composite fiber is unevenly distributed in the fabric in a high density state.

[0037]

Therefore, the cloth obtained by the method according to the present invention has a silky squeaky feeling, and the highly-contracted non-composite fibers are unevenly distributed in the cloth at a high density.
It has the effect of having a desired tension and waist and a good feeling of repulsion. Furthermore, since a predetermined mixed fiber entangled yarn is used, the surface quality is also excellent. Therefore, the silky high-density fabric obtained by the method according to the present invention can be suitably used as a raw material for clothing.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an example of a low-shrinkage conjugate fiber used in the present invention.

FIG. 2 is a cross-sectional view of the fiber body X after the composite fiber shown in FIG. 1 has been subjected to alkali reduction treatment.

[Explanation of symbols]

 1 Convex part of fiber body X, 2 Filler, 2'groove part

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Claims (1)

[Claims] 1. A fiber-shaped main body X having a cross-sectional shape having a multi-leaf cross section having three or more convex portions and having a hot water shrinkage ratio of 15% or less, in the vicinity of all apex vertices of the fiber main body X. A plurality of groove portions which continuously exist in the fiber axis direction and which satisfy the following formulas (1) and (2) are formed, and the groove portion is a polyester type having a higher alkali solubility than the polyester type component A. It comprises a low shrinkage conjugate fiber filled with component B and a polyester component C having a lower alkali solubility than the polyester component B, and has a hot water shrinkage of 20% or more and a peak temperature of 100 ° C. or more. And a highly shrinkable non-composite fiber having a maximum thermal stress value of 0.4 g / d or more is entangled at a entanglement number of 20 to 80 pieces / m using a mixed fiber entangled yarn, At least 40% by weight of entangled yarn After obtaining the dough, the dough is subjected to an alkali weight reduction treatment to dissolve and remove the polyester component B present in the low-shrinkage composite fiber to form the fiber main body X, and then the hot water treatment. The method for producing a silky-tone high-density fabric, characterized in that the high-shrinkage non-composite fiber is made to exhibit a higher shrinkage than the fiber main body X. 9 ≦ N ≦ 25 (1) 0.1 μm ≦ H ≦ 8 μm (2) (where N is the total number of grooves in all convex portions, and H is the depth of each groove). )