WO2001081662A1

WO2001081662A1 - Polyester fiber having deformed cross section and yarn and fabric comprising the same

Info

Publication number: WO2001081662A1
Application number: PCT/JP2001/001742
Authority: WO
Inventors: Tomoo Mizumura; Chiaki Tashiro; Ichiro Kitano; Nobuyoshi Miyasaka
Original assignee: Teijin Limited
Priority date: 2000-04-25
Filing date: 2001-03-06
Publication date: 2001-11-01
Also published as: AU3611301A; EP1209260A4; EP1209260A1

Abstract

A polyester fiber having a deformed cross section, characterized in that the transverse cross section of the fiber has a triangle portion (A) and a flat projecting portion (B) which continues to a top of the triangle and extends flat therefrom, and satisfies the following relationships: 0.7 ≤ (L1/L2) ≤ 3.0, 3.0 ≤ (h2/h1) ≤ 10.0, wherein L1 represents the distance from the free end of (B) to the midpoint of the line connecting two points which connect the contour of (A) and the contour of (B), L2 represents the distance from the midpoint of the line connecting two points which connect the contour of (A) and the contour of (B) to the midpoint of the side of (A) being opposite to the above connecting line, h1 represents the length of the connecting line, and h2 represents the maximum width of (A) in the direction perpendicular to the longitudinal direction of (B).

Description

Description Polyester modified cross-section fiber and yarn and fabric containing the same

TECHNICAL FIELD The present invention relates to a polyester cross-section fiber and a yarn and a fabric containing the same. More specifically, the present invention provides a polyester modified cross-section fiber having excellent luster and bulkiness, having a preferable touch and high flexibility, and a preferable silky texture, high bulkiness and flexibility including the same. Related to yarns and fabrics

Background art

Conventionally, in order to impart a desired feeling to synthetic fibers, particularly polyester fibers, there are known a number of means for changing the cross section of the fibers. For example, a polyester fiber is given a triangular cross section to make its gloss and feel close to the gloss and touch of silk, or a synthetic fiber is given a multi-palm cross section to give it a dry feeling. There is known a synthetic fiber in which the cross-sectional shape of a synthetic fiber is mushroom-shaped to improve the dry feeling and the tingling feeling.

In addition, a mixed fiber of the synthetic fiber having the irregular cross-section and another synthetic fiber having a different shrinkage property from the synthetic fiber is manufactured, and the bulky property and the softness are formed by using the hetero-shrinkable mixed fiber thread. It is also known to produce silk cloth-like fabrics having high softness. However, most of the polyester fibers having the conventional silk-like texture have a texture close to that of the silkworm silk fibers, and are classified into wild silk fibers, particularly tussah silk fibers. There are few synthetic fibers with a feeling similar to that of fibers, and sometimes silk-like Synthetic fibers are clearly different from wild silkworm silk fibers in their natural feeling of creaking. Further, conventional silk-like synthetic fibers have been unsatisfactory in properties such as bulkiness, flexibility and lightness of natural silk fibers. Japanese Patent Application Laid-Open No. 56-20638 discloses a polyester fiber yarn capable of forming a fabric having a silk-like surface feel and tingling, and the silk-like polyester fiber yarn contains an organic sulfonic acid. The polyester composition is obtained by melt-spinning through a number of spinnerets having a circular cross-sectional shape, stretching, and subjecting the obtained drawn fiber yarn having a circular cross-section to a weight reduction treatment. . In this silk-like polyester fiber yarn, a large number of micropores are formed in each fiber along the fiber axis direction. However, when this conventional method is applied to a polyester fiber yarn having an irregular cross-sectional shape such as a triangular cross-sectional shape, the resulting polyester irregular-shaped fiber yarn has a natural feeling of tussah silk thread, bulkiness, It is known that it does not satisfy flexibility and lightness.

On the other hand, it is known that unstretched synthetic fibers are stretched at a draw ratio less than the natural draw ratio to generate unevenness in the stretched fibers to obtain thick stretched fibers. It is known that the surface of a fabric obtained using such a thick and thin fiber yarn has an uneven feel and appearance due to the thick and thin spots of the fiber. However, even if the conventional synthetic fiber having a triangular or multi-lobal cross-sectional shape is formed into a thin fiber, the resulting irregular-shaped cross-sectional synthetic fiber has a natural feeling of tussah silk-like natural feeling, bulkiness, and flexibility. Sex or lightness cannot be demonstrated.

Therefore, the development of polyester fibers, yarns and fabrics having a natural feeling of tussah silkiness, bulkiness, flexibility and light weight, has been strongly desired. Disclosure of the invention

An object of the present invention is to provide a polyester modified cross-section fiber excellent in characteristics such as wild silkworm-like natural sensation, gloss, bulkiness, flexibility, and lightness, and a yarn and a fabric containing the same. Things.

The polyester cross-sectional fiber of the present invention has a cross-sectional shape of a single fiber containing polyester,

(A) a triangular portion having a triangular shape;

(B) a flat protruding portion that is continuous with the top of the triangular portion and extends from the flat portion to a flat bar shape;

Having, and

The following relations:

(1) 0.7≤ (L1 / L2) ≤3.0

as well as

(2) 3.0≤ (h2 / hl) ≤10.0

[However, in equation (1),

L1 is a protruding tip of the flat protruding portion (B) from a midpoint of a connecting line connecting two connecting points of the contour of the triangular portion (A) and the contour of the flat protruding portion (B). Represents the distance to

L2 represents a distance from a midpoint of a connecting line between the triangular portion (A) and the flat protruding portion (B) to a midpoint of the opposite side of the triangular portion (A) facing the connecting line,

In the above formula (2),

hi represents the width of the flat protrusion (B),

h2 represents the maximum width of the triangular portion (A) in a direction perpendicular to the longitudinal direction of the flat protruding portion (B).

Satisfy

It is characterized by the following. In the cross-sectional shape of the single fiber of the polyester modified cross-section fiber of the present invention, the following relational expression (3):

(3) 2.0 ≤ (Ll / hl)

Is more preferably satisfied.

In the polyester modified cross-section fiber of the present invention, a hollow portion extending along the longitudinal direction of the fiber may be formed in the triangular portion (A).

0.5-2.5% by weight, based on the weight of the polyester forming the fiber, of the following general formula (I):

RS0 ₃ Mn (I)

[Wherein, in the formula (I), R represents one member selected from an alkyl group containing 3 to 30 carbon atoms, and an aryl group and an alkylaryl group containing 7 to 40 carbon atoms, and M Represents a member selected from alkali metals and alkaline earth metals, and n represents 1 when M represents a monovalent metal, and represents 1 Z 2 when M represents a divalent metal.

It is preferable that the organic sulfonic acid metal salt represented by the following formula is blended.

It is preferable that the single fiber has a thick fineness portion and a fine fineness portion formed alternately in the longitudinal direction, and the number of the fine fineness portions is 20 or more and Zm or more.

The polyester yarn of the present invention is characterized by containing the above-mentioned polyester modified cross-section fiber of the present invention.

In the polyester mixed fiber yarn of the present invention, the polyester modified cross-section fiber has a thick fine portion and a fine fine portion alternately formed in the longitudinal direction thereof. It is preferable that 20 fine 度 ι or more thick fineness portions are distributed in the direction.

The mixed yarn of the polyester of the present invention is the same as that of the polyester of the present invention. A minimum boiling water shrinkage fiber component comprising a cross-section fiber;

A high boiling water shrinkage fiber component comprising at least one type of polyester fiber having a boiling water shrinkage higher than the boiling water shrinkage of the polyester deformed section fiber;

It is characterized by including.

In the polyester mixed yarn of the present invention, the polyester fiber having the lowest boiling water shrinkage rate fiber component and the polyester fiber having the highest boiling water shrinkage rate contained in the high boiling water shrinkage rate fiber component, Preferably, the difference is between 4 and 40%.

In the polyester fiber blended yarn of the present invention, the polyester contained in the polyester fiber having the highest boiling water shrinkage is polyethylene terephthalate toysophthalate, and the content of isophthalic acid in the dicarboxylic acid component is 5%. it is preferably 15 mol ^_0/0.

In the polyester mixed fiber of the present invention, the polyester fiber having the highest boiling water shrinkage ratio is a thick and thin fiber having a thick fine portion and a fine fine portion alternately distributed in the longitudinal direction, and the polyester mixed fiber containing the same. It is preferred that a large fineness of 20 Zm or more is distributed in the longitudinal direction of the yarn.

The polyester fabric of the present invention includes at least one kind of yarn selected from the polyester yarn of the present invention and the polyester mixed yarn, and has a silky feeling.

In the polyester fabric of the present invention, it is preferable that the fabric is a woven fabric, the yarn is a twisted yarn having a twist coefficient of 2500 or more, and the twisted yarn is used as a warp of the woven fabric. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a cross-sectional description of an example of the polyester cross-section fiber according to the present invention. It is a clear diagram,

FIG. 2 is a cross-sectional explanatory view of another example of the polyester modified cross-section fiber of the present invention,

FIG. 3 is a cross-sectional explanatory view of still another example of the polyester modified cross-section fiber according to the present invention,

FIG. 4 is a cross-sectional view showing an example of a spinneret of a spinneret used for producing the polyester modified cross-section fiber of the present invention.

FIG. 5 is a cross-sectional explanatory view showing another example of a spinning hole of a spinneret used for producing a polyester modified cross-section fiber of the present invention; and

FIG. 6 is a cross-sectional explanatory view showing still another example of the spinning hole of the spinneret used for producing the modified polyester fiber of the present invention. BEST MODE FOR CARRYING OUT THE INVENTION

As the polymer component constituting the polyester fiber having an irregular cross section of the present invention, an ethylene terephthalate unit, a trimethylene terephthalate unit, or a tetramethylene terephthalate unit is mainly used. Those composed of polyethylene terephthalate which is contained as a return unit are preferred, but if necessary, in addition to the ethylene terephthalate unit, copolymerized copolymers containing other types of repeating units, for example, ethyleneisophthalate unit esters for example, be poly ethylene terephthalate rate Toys Seo Futare DOO, the content of the other species repeating units is preferably 15 mol ^_0/0 following total molar amount that a repetitive unit, It is more preferably at most 10 mol%, more preferably at most 5 mol%.

The polyester fiber of the present invention may include: other additives, for example: anti-glazing agents, such as titanium dioxide, zinc oxide, etc., and ultraviolet absorbers, heat stabilizers, antioxidants, coloring agents, etc. . Especially of the present invention In a polyester fiber, the following formula (I):

RS0 ₃ Mn (I)

[Wherein, in the formula (I), R represents a member selected from an alkyl group containing 3 to 30 carbon atoms, and an aryl group and an alkyl aryl group containing 7 to 40 carbon atoms. , M represents a member selected from alkali metals and alkaline earth metals, n represents 1 when representing M or a monovalent metal, and 1 / when representing M or a divalent metal. Represents 2)

Is preferably blended in an amount of 0.5 to 2.5% by weight, based on the weight of the polyester component, and the amount of addition is 0%. More preferably, it is 8 to 1.2% by weight. By subjecting the polyester fiber containing such a metal salt of an organic sulfonic acid to an alkali reduction treatment, a large number of micropores arranged in the fiber axis direction can be formed on the surface of the fiber. The micropores in the polyester surface portion give the polyester fiber which has been subjected to the alkali reduction treatment a favorable dry feeling and squeaky feeling like tussah silk, and the yarn and fabric produced with this fiber are like the tussah silk. Has a good touch and appearance (gloss). When R represents an alkyl group or an alkylaryl group in the metal organic sulfonic acid salt represented by the chemical formula (I), the alkyl group may be linear or branched. It may have a side chain. In particular, in order to increase the compatibility with the polyester, the metal salt of an organic sulfonate of the formula (I) is preferably a metal salt of an alkyl sulfonate having an alkyl group R as defined above. The metal is selected from alkaline metals such as sodium, potassium and lithium, and alkaline earth metals such as calcium and magnesium, and in particular, sodium or potassium. Preferably, there is. The metal salt of an organic sulfonic acid represented by the general formula (I) used in the present invention is sodium stearyl sulfonate, Kuchirusuruhon acid isocyanatomethyl Li © beam, and this selected from c _₈ _ c ₁ ₈ alkyl sulfonic acid alkali metal salts such as lauryl sulfonate diisocyanatohexane Li © beam is preferred.

The cross-sectional shape of the polyester fiber having an irregular cross section of the present invention will be described with reference to FIG. In FIG. 1, the cross-sectional shape 1 of the polyester-containing single fiber is composed of (A) a triangular portion 2 having a triangular shape, and (B) a flat portion which is continuous with a top portion of the triangular portion 2 and which extends in a flat shape. And a projection 3. In this cross-sectional shape, the outline of the triangular portion 2, that is, the outline 2 of the two sides 2 a and 2 b that are directed to the continuous portion 4 and face each other and the outline of the flat protruding portion 3, that is, the shape that faces each other 2 Sides 3a and 3b cross and connect at intersections 4a and 4b. At a connection line 4c connecting the intersections 4a and 4b, the triangular portion 2 and the flat protrusion 3 are connected to each other. The midpoint of this connecting line 4c (4a—4b) is indicated as 4d.

The triangular portion 2 has the opposite side 2c facing the connection line 4c, and the midpoint of the opposite side 2c is indicated by 2d. The distal end face 3c of the flat projection 3 has a projecting end point 3d. In FIG. 1, the triangular portion 2 has the shape of an equilateral triangle whose three sides 2a, 2b, 2c are equal in length. Therefore, the cross-sectional shape shown in FIG. 1 is vertically symmetrical with respect to the straight line 5 passing through the midpoint 3d of the distal end face 3c of the flat protrusion 3 and the midpoint 4d of the connecting line 4c. Another cross-sectional shape of the modified polyester fiber of the present invention is shown in FIG. 2, and the triangular portion 2 has the shape of a scalene triangle formed from three sides 2a, 2b, and 2c having different lengths. Have.

This cross-sectional shape is asymmetric at the upper limit with respect to a straight line 5 passing through the midpoint 3d of the distal end surface 3c of the flat protrusion 3 and the midpoint 4d of the connection line 4c.

The deformed cross-sectional shapes of the polyester fiber of the present invention shown in, for example, FIGS. 1 and 2 satisfy the following relational expressions (1) and (2).

0.7 ≤ (L1 / L2) ≤ 3.0 (1) as well as

3.0 ≤ (h2 / hl) ≤ 10.0 (2)

In the above equation (1), LI represents the distance from the midpoint 4d of the connecting line 4c between the triangular portion 2 and the flat protrusion 3 to the protruding tip point 3d of the flat protrusion 3, and L2 represents the distance of the connecting wire 4c. It represents the distance from the midpoint 4d to the midpoint 2d of the side 2c of the triangular portion 2 facing the connecting line 4c.

In the above equation (2), hi represents the length of a connecting line 4c (4a—4b) between the triangular portion 2 and the flat protruding portion 3 (3), and h2 represents the longitudinal direction of the flat protruding portion 3. That is, it represents the maximum width of the triangular portion 2 measured in a direction perpendicular to the direction of the straight line connecting the protruding tip point 3d and the midpoint 4d of the connecting line 4c.

When the cross-sectional shape of the polyester fiber formed by the triangular portion and the flat protruding portion is different from the above shape, for example, the flat protruding portion extends from only one side of the triangular portion. In the case where the outer line intersects only one side of the triangular part), the stability of the melt-spinning process becomes insufficient, and two or more flat parts are formed from two or more tops of the triangular part. When the protruding portion is protruding, the texture of the resulting polyester cross-section fiber is different from that of wild silk. Further, when the shape of the protruding portion is not flat (for example, when the shape is circular), the desired irregular feeling cannot be obtained in the feeling of the obtained polyester cross-section fiber, the yarn and the fabric obtained therefrom. Inconvenience occurs.

The equation (1) defines the relationship between the length L1 and L2 of the flat protruding portion (B) and the triangular portion (A) protruding from the connection line 4c, and the value of the ratio L1ZL2 is 0.7 to 3 When it is within the range of 0.0, the obtained polyester fiber with irregular cross-section, and the yarn and fabric containing the same can exhibit good balance in terms of feeling of tingling, flexibility and bulkiness. If the ratio L1 / L2 is less than 0.7, the resulting polyester deformed When the ratio of L1 / L2 exceeds 3.0, the melt-spinning process of the target polyester deformed cross-section fiber becomes unsatisfactory. Insufficient stability results in insufficient bulkiness of the resulting fibers, yarns and fabrics. More preferably, the value of the ratio L1 ZL2 is in the range from 1.5 to 2.5.

The above relational expression (2) defines the ratio of the thickness of the flat protruding portion (B) to the thickness of the triangular portion (A), and the value of this ratio is obtained by the obtained polyester modified cross-section fiber, It is important to obtain a good balance between the feeling of creaking, flexibility and bulkiness of the yarn and fabric containing the same. When the value of the ratio hlZh2 is less than 3.0, the resulting polyester deformed fiber, the yarn and the fabric containing it, become unsatisfactory in bulk, and when the value of this ratio exceeds 10.0, However, the stability of the melt-spinning process of the polyester modified cross-section fiber becomes insufficient, and the quality of the obtained fiber becomes uneven. Preferably, the value of the ratio hlZh2 is in the range of 4.0 to 7.0. In the polyester modified cross-section fiber of the present invention, the cross-sectional shape preferably satisfies the following relational expression (3) in addition to the above expressions (1) and (2).

2.0 ≤ (Ll / hl) (3)

Further, the value of the ratio Ll / hl is preferably from 2.0 to 20, and more preferably from 5.0 to 10. When the value of the ratio LlZhl is less than 2.0, the cross-sectional shape of the protruding portion is not flat, and the resulting polyester irregular-shaped fiber, and the yarn and fabric containing it, have a feeling of tingling and flexibility on wild silk. May be unsatisfactory.

In Fig. 1, the projecting direction of the flat protrusion 3 (the direction of the straight line 3c-4c) is sandwiched between the extension lines (not shown) of the two sides 2a and 2b of the triangular part 2 connected to the flat protrusion. It is preferable that the angle be within the angle defined by the apex angle A between the two sides 2a and 2b. preferable. That is, it is preferable that this bisector is on the extension of the straight line 3d_4d.

In the cross-sectional shape of the flat protruding portion 3, it is preferable that two opposing sides 3a and 3b are parallel to each other. However, as long as the shape is recognized as a flat body, various cross-sectional shapes may be obtained. Good. For example: The cross-sectional shape of the flat protrusion 3 may have a gentle wavy shape. In this case, the amplitude of the center line of the flat protrusion is not more than 0.3 times the length hi of the connection line 4c. It is preferable that the thickness of the flat protrusion 3 is slightly changed. In this case, the maximum thickness of the thick portion and the minimum thickness of the thin portion are reduced. Is preferably 1.5: 1 or less, or at least one of the two sides 3a and 3b opposed to each other may have at least one prominent bump. The height of the hump is preferably not more than 0.2 times the length of the connecting line 4c (4a-4b), or the thickness of the flat protruding portion is from the connecting line portion 4d to the tip surface 3c. May gradually decrease in the direction of. In this case, each of the two sides 3a and 3b of the flat protruding portion 3 is opposed to the straight line 3d-4d of the two sides 3a and 3b. The inclination angle is preferably 15 degrees or less.

In the cross-sectional shape of the polyester cross-section fiber of the present invention, referring to FIG. 1, the shape of the triangular portion 2 includes various deformed shapes within a range in which the triangular portion 2 can be recognized as a triangle, an equilateral triangle, an isosceles triangle. shape

(2a = 2b) or a scalene triangle, and the sides 2a, 2b, 2c may be straight lines, may be concave curves on the inside, or may be curves on the outside. The top may be a convex curve, and the other tops except the top connecting the flat protrusions 2 may be rounded, for example, as shown in FIG.

If the shape of the triangle 2 is replaced by another shape, for example a shape such as a circle, square or hexagon, the resulting polyester variant The texture of the surface fiber, the yarn and the fabric containing it, is unsatisfactory in the feeling of creaking. In the cross-sectional shape of the modified polyester fiber of the present invention, as shown in FIG. 2, a hollow fiber in which a hole 6 is formed in the triangular portion 2 may be used. The hollow portion 6 extends along the longitudinal direction of the fiber (fiber axis). The hollow portion 6 improves the bulkiness and lightness of the polyester modified cross-section fiber. However, in the cross-sectional shape, the area of the hollow portion 6 is preferably 15% or less, more preferably 3 to 10% of the total area of the triangular portion 2. When the hollow portion is excessively large, the stability of the melt spinning process of the obtained fiber becomes insufficient.

The modified polyester fiber of the present invention can be produced, for example, by the following method. That is, a resin containing polyester as a main component is melted at a temperature of 280 to 300 ° C, extruded from a spinning hole of a melt spinneret, and cooled and solidified while taking up a fibrous molten resin flow formed thereby to apply an oil agent. An unstretched fiber is formed, and if necessary, the unstretched fiber is interlaced by an interlace imparting device. Thereafter, the unstretched fiber is wound around a winder at room temperature via a pair of take-off rollers. The undrawn fiber is preheated by a preheating roller 1 heated to a temperature of 80 to: L10 ° C, and a non-contact heater set to 170 to 220 ° C, and a drawing speed of 60 to 1400 m / While supplying and heating in minutes, the fiber is drawn at a draw ratio of 1.5 to 3.0, and the drawn fiber is further subjected to an interlace treatment as necessary and wound up.

The spinning hole of the spinneret used for producing the modified polyester fiber of the present invention has, for example, a hole shape shown in FIGS.

In FIG. 4, a spinning hole 11 formed in a spinneret 15 has a shape in which a flat protruding hole portion 13 and a triangular hole portion 12 are connected. The opposite side 15 of the triangular part opposite to is curved concavely inward. The curved surface of the fibrous molten polyester flow extruded from the spinning hole forms a substantially flat surface due to the surface tension immediately after the discharge.

The spinning hole 11 shown in FIG. 5 is the same as that shown in FIG. 4, but the length of the flat protrusion 12 is shorter than that shown in FIG.

The spinning hole 21 shown in FIG. 6 is for producing a hollow irregular-section fiber, and the hollow triangular portion 22 has a triangular vertex 22a connected to the flat protruding portion 13; The two fibrous polyester streams extruded from the two-part spinning holes 22a and 22b are joined immediately after passing through the spinning holes to form one hollow profile. Form a planar fibrous polyester stream.

The single fiber fineness of the modified polyester fiber of the present invention is not particularly limited, but is preferably 1.5 to 4.5 dtex, and a total fineness of 55 to: 17 Odt ex yarn (single fiber bundle) ) Is preferably produced.

The boiling water shrinkage (according to JISL 1013) of the modified polyester fiber of the present invention is preferably in the range of 3.0 to 10.0%, and more preferably 4.0 to 9.0%. preferable.

The polyester modified cross-section fiber of the present invention includes a fine fiber in which a polyester-containing single fiber has a thick fine portion and a fine fine portion alternately formed in its longitudinal direction (fiber axial direction).

In order to produce such thick fibers, a known spot stretching method of stretching unstretched fibers at a draw ratio of not more than the natural draw ratio may be applied. At this time, for example, a method in which the undrawn fiber bundle once wound up is drawn while intermittently contacting the frictional resistor, and a fluid agitation such as an interlace treatment or a Taslan treatment is applied to the undrawn fiber bundle as a pretreatment. The method of drawing after making the undrawn fiber non-uniform Can be used. In the above-described drawing method, since the positions of the drawing points of the single fibers in the undrawn fiber bundle are unevenly distributed, in the obtained drawn fiber bundle, each of the large fineness portion and the texture portion of the single fiber contained therein The distribution of the fibers becomes non-uniform, so that the single-fiber fine and fine fiber portions are randomly distributed in the longitudinal direction of the fiber bundle. Therefore, in the drawn fiber bundle, it is possible to prevent the large fine portion or the fine fine portion from overlapping and distributing.

In the yarn of the present invention containing the polyester modified cross-section thick and thin fibers, the number of distribution of the thick fineness portion in the longitudinal direction thereof is preferably 20 pieces / m or more. The number is more preferably 40 / m, and even more preferably 20/111 to 30/111.

The yarn containing the above-mentioned polyester irregular-shaped thin fiber, and the fabric produced by using the yarn, recognize the net-like rough feeling (feeling of unevenness) by touching the yarn surface or the fabric surface. Can be.

When the number of distributions of the fine fineness portion in the yarn is less than 20 pieces / m, the distribution of the fine fineness portion and the fine fineness portion is too sparse, and the appearance and touch are uneven, and the quality of the yarn is evaluated as low. You. Further, in a fabric produced from such a yarn, the large fineness portion distributed on the surface of the fabric gives a foreign-body sensation, giving a sensation that is significantly different from a natural silky sensation.

In the present invention, the number of distributions of the fineness portion of the yarn containing the polyester modified cross-section thick and thin fibers is measured by the following method.

The test yarn is supplied to Evenness Tester (manufactured by Keisoku Kogyo Co., Ltd.) under the conditions of a yarn speed of 8 m, a chart speed of 0.05 mZ, a range of ± 50%, and Normal. And measure the number of peaks showing a thickness that is 10% or more larger than the base thickness of the yarn per lm of the yarn. The measured number is used as the number of large fines per meter of yarn.

In the fine fiber, the thick fineness portion has a low draw ratio, Because of the low mechanical strength of the fine fibers, it is preferable that the thick fineness portions of the single fibers do not locally aggregate in the fine fiber yarn. If the distribution number of the thick fiber portion of the thick fiber yarn exceeds 40 Zm, the distribution ratio of the single fiber thick fiber portion may be too high and the mechanical strength of the yarn may be insufficient. In addition, the rate of occurrence of fiber breakage or yarn breakage in the production and processing steps is increased. The polyester modified cross-section fiber (including the thick fiber) of the present invention may form a yarn by itself, or may be mixed with other fibers to form a mixed fiber. Is also good.

The other fibers used in the polyester mixed yarn of the present invention may be fibers made of a polymer different from polyester, polyester fibers having different cross-sectional shapes and Z or fineness, or other fibers. It may be a polymer fiber or a polyester fiber or other polymer fiber having different physical properties (chemical, mechanical, thermal, and / or electrical, for example, boiling water shrinkage). .

The polyester mixed fiber yarn of the present invention contains the polyester cross-sectional fiber of the present invention as a minimum boiling water shrinkage fiber component, and further has a boiling water shrinkage higher than the boiling water shrinkage of the polyester deformed cross-sectional fiber. Both are characterized by containing a high boiling water shrinkable fiber component composed of one kind of polyester fiber.

The polyester fiber used for the high boiling water shrinkage fiber component is composed of the same polymer as the minimum shrinkage polyester fiber (polyester modified cross-section fiber of the present invention), and may differ only in boiling water shrinkage. In order to exhibit a high boiling water shrinkage ratio, it is preferable to use a fiber made of a copolymerized polyester. As the copolymerized polyester, an ethylene glycol component forming poly (ethylene terephthalate) and a terephthalic acid Some of the components, isophthalic acid, bisph Enol and aromatic dicarboxylic acids having a metal sulfonate group, for example, 5-sodium sulfoisophtalic acid, 5-calcium sulfoisophtalic acid, 5-lithium sulfoisophtalic acid, 4- natrium sulfoisulfuric acid Those substituted with sophthalic acid, 41-sodium sulfo-1,2,6-naphthalene dicarboxylic acid, etc. are used. Preferably, polyethylene terephthalate toy sophthalate is used. The content of isophthalic acid in the dicarboxylic acid component in this polyethylene terephthalate toisophthalate is preferably 5 to 15 mol%, more preferably 8 to 12 mol%. Such polyethylene terephthalate isophthalate fibers have good mechanical properties, for example, tensile strength and breaking elongation, and can exhibit sufficiently high boiling water shrinkage.

When the high-shrinkage fiber and the minimum-shrinkage fiber are formed from the same type of polyester, for example, different spinning draft, drawing, and Z or heat treatment conditions may be used during the production. .

There is no particular limitation on the cross-sectional shape of the high-shrink fiber other than the minimum shrinkable fiber used in the mixed fiber of the present invention. By using a fiber having the same cross-sectional shape as the minimum shrinkable deformed fiber, the bulkiness, flexibility, lightness, and sensation of the mixed fiber obtained and the fabric obtained therefrom can be further improved. be able to.

In addition, in order to improve the mixing property with the minimum shrinkable fiber, it is preferable that the monofilament fiber of the high shrinkage fiber is substantially the same as the minimum shrinkage fiber, that is, within the range of 1.5 to 4.5 dtex. Is preferred. Further, the boiling water shrinkage of the fiber having the highest boiling water shrinkage is preferably in the range of 15.0 to 40.0%.

Mixing weight ratio of minimum shrinkable fiber component and high shrinkage fiber component (the former: after When the mixed fiber is composed of these two kinds of fibers, the ratio is preferably within the range of 2: 8 to 8: 2, and more preferably 3: 7 to 7: 3. preferable. If the former is too large, the effect of improving bulkiness, flexibility, and lightness may be insufficient, while if too small, impairment of feeling, such as the tingling sensation of the minimum shrinkable fiber, may not be achieved. May be sufficient.

In order to produce the mixed fiber of the present invention, the minimum shrinkable fiber component and the high shrinkable fiber component are mixed by a conventionally known method, and a confounding treatment may be applied thereto. For example, the two fiber components that were once wound separately may be aligned, the drawn yarn may be further stretched as necessary, and then may be subjected to the blending and entanglement process. The two types of fiber components discharged from the same spinneret or different spinnerets may be mixed and entangled in the spinning step, and thereafter, the mixed entangled yarn may be stretched as necessary.

At this time, the number of entangled fibers in the mixed yarn is preferably 30 to 80 per m. If the number of entangled fibers is too small, the convergence of the obtained yarn may be low and the handleability may be insufficient.On the other hand, if the number is too large, the bulkiness and flexibility of the mixed fiber obtained may be small. Insufficient properties and light weight may result in spun yarn.

The fabric produced by using the mixed fiber of the present invention, when subjected to a boiling water treatment, a high-temperature hot water treatment, or a high-temperature dry heat treatment in the dyeing / finishing process, mainly shrinks in the high shrinkage fiber portion. Then, the core portion of the fabric is formed, and the minimum shrinkage fiber portion is mainly distributed on the surface of the fabric, so that the entire fabric exhibits good bulkiness, appropriate flexibility, and lightness. . In addition, the lowest-shrinkable irregularly-shaped cross-sectional fibers mainly distributed on the surface of the fabric develop a silky squeaky feeling and a silky luster that are preferable for the fabric.

In the polyester mixed fiber of the present invention, the minimum boiling water shrinkage fiber The difference in the boiling water shrinkage between the polyester irregular cross-sectional fiber for the component and the polyester fiber contained in the high boiling water shrinkage fiber component and having the highest boiling water shrinkage is preferably 4 to 40%, and 6 to 40%. More preferably, it is 35%. If the difference in shrinkage is less than 4%, the resulting mixed fiber and the fabric obtained therefrom may have insufficient bulkiness, silky squeaky feeling, silky shine, etc. Exceeds 40%, the bulkiness of the mixed yarn subjected to the boiling water shrinkage or heat shrinkage treatment may become excessively bulky, resulting in unsatisfactory handleability. The feeling of the yarn fabric may be hard.

In the polyester blended yarn of the present invention, the cross-section fiber with the lowest boiling water shrinkage ratio may be a fine fiber having a fine fineness portion and a fine fineness portion formed alternately in the longitudinal direction. The mixed fiber containing fibers has a large fineness distribution of preferably 20 or more Zm, more preferably 20 to 40 / rn, and still more preferably 20 to 30 Zm in the longitudinal direction. It may be. By using such a polyester fiber having a thin cross section with a low boiling water shrinkage ratio as a fiber component, it is possible to further improve the silky feeling of the polyester mixed fiber obtained and the fabric obtained using the same.

A cloth having a silky feel and appearance can be produced using a polyester-based fiber containing the modified polyester fiber (which may be a fine fiber) of the present invention, and Z or mixed fiber. In this fabric production method, for example, a polyester yarn or a mixed fiber yarn is twisted as necessary, and a knitted fabric having a desired structure may be knitted and woven using the yarn. If this fabric is subjected to an alkali weight reduction treatment as required, it is possible to obtain characteristics that could not be obtained by the conventional polyester fiber fabric, that is, excellent silky squeakiness, bulkiness, flexibility, and lightness. Will be possible.

In the polyester fiber fabric of the present invention, particularly, In order to improve the lightness and the lightness, it is preferable that the fabric has a simple knitting structure. For example, a plain weave structure and its change structure, a simple twill weave structure and its change structure, a satin weave structure, its change structure, and circular knitting It is preferable to use a structure (such as a sheet of jersey, smooth, rib, fawn, punch roma, motta opening, and cross-mix) and a warp knitting structure (such as denbi, half, satin, and atlas). Further, the weight of the fabric is not particularly limited, but is preferably light weight of 300 g / ² or less. When the silk-like polyester fabric of the present invention is a woven fabric, the yarn used for the woven fabric preferably has a twist coefficient of 2,500 or more, and more preferably, 3,000. It is 10,000. When a yarn having such a twist coefficient is used, the resulting woven fabric is prevented from slipping between the yarns in the weaving structure even when the density of the warp and the weft in the weaving structure is low. Good passability of the single-color liquid to the fabric at the time of single-color processing of the fabric is achieved, and therefore, defects caused by poor passability of the single-color liquid to the fabric are prevented. There is no particular limitation on the content of the polyester modified cross-section fiber in the polyester modified cross-section fiber yarn and / or mixed fiber fabric of the present invention, as long as the obtained fabric has desired performance, feeling, and appearance (gloss). It is preferred that the polyester irregular cross-section fiber yarn having the above-mentioned twist coefficient and the fiber or the mixed fiber of the present invention be used as at least a warp in a woven fabric. Of course, the higher the content of the polyester cross-section fiber contained in the polyester fabric of the present invention, the more the silk-like feeling, performance and appearance of the obtained fabric are improved.

The twist coefficient of the fuel yarn is calculated by the following equation.

Twisting factor = Twisting number (twist m) X (9Z10X yarn thickness (dt ex)) ^1/2 Example

The polyester modified cross-section fiber of the present invention, and yarns and fabrics containing the same will be further described with reference to the following examples. Example 1

It contains 0.6% by weight of sodium alkylsulfonate having a carbon number in the range of 8 to 20 and an average carbon number of 14, and has a solid solution viscosity (in an orthochlorophenol solution at 35 ° C). (Measurement) Polyethylene terephthalate having a temperature of 0.61 was melt-discharged from a spinneret having a spinning hole shown in Fig. 4, and the discharged fibers were cooled and solidified, an oil agent was applied, and then an interlace was applied. After that, it was taken up and wound at a speed of 1400 m / min. The obtained undrawn yarn is drawn at a preheating roller temperature of 87 ° (: a hot set heater (non-contact type) at a temperature of 200 ° C, a draw ratio of 2.3 times, and a drawing speed of 800 mZ min.). An interlace treatment was applied to produce a fiber yarn with a modified cross section of 83.3 dtex (75 denier) / 24 filaments, whose cross-sectional shape characteristics are shown in Table 1.

The obtained yarn is twisted with a twist coefficient of 2000, and is used as a warp and a weft, and woven into a double woven fabric having a warp density of 90 Z2.54 cm and a weft density of 88 / 2.54 cm. The fabric is refined (95 ° C), heat set (180 ° C), alkaline weight reduction (95 ° C) (weight loss 15%), and dyed (one color navy, 130 ° C). A plain dyed fabric was obtained. Table 1 shows the evaluation results.

In addition, each evaluation item such as sensation, swelling, lightness, etc. was extremely good (excellent) and good according to a sensory test conducted by five skilled panelists.

(Good) and Bad (Not good).

Examples 2 and 3, and Comparative Examples 1 to 6

A plain dyed fabric was produced in the same manner as in Example 1 except that the cross-sectional shape characteristics were changed as described in Table 1. Table 1 shows the evaluation results. table 1

Examples 4 and 5

An undrawn fiber yarn was produced in the same manner as in Example 1 except that the discharge amount in the melt spinning step was changed so that the total fineness after drawing was 83.3 dtex (75 denier). This was stretched at a preheating roller temperature of 65 ° C, a heat set heater (non-contact type) at a temperature of 165 ° C, a stretching ratio of 1.6, and a stretching speed of 800 mZ. 75 deniers) A thick fiber yarn of Z24 filament was obtained. Table 2 shows the cross-sectional shape characteristics of this fiber and the number of distributions of the fineness portion. The obtained yarn was twisted in the same manner as in Example 1 and woven into a double woven fabric, which was then refined (95 ° C), heat set (180 ° C), and reduced in alkali (reduction rate 15%). %, 95 ° C) and dyeing (one color navy, 130 ° C) to obtain a plain dyed fabric. Table 2 shows the evaluation results of the woven fabric.

The silky rough surface of the woven fabric was also extremely good (excellent), good (good), and poor according to a sensory test conducted by five skilled panelists. (Not possible)

Table 2

Example 6

An undrawn fiber yarn was prepared in the same manner as in Example 1 except that the take-up speed in the melt spinning step was set to 1450 m / min in Example 1, and this was heated at a preheating roller temperature of 87 ° C and heat set. Heater (non-contact type) Temperature 200 ° C, stretching ratio 2.2 times, stretching speed 800mZ min, 9 Odtex / 24 filament, strength 2.2cN / dtex, elongation 35%, boiling water shrinkage 9 % Of low-shrinkage irregularly shaped fiber yarn was obtained.

On the other hand, the Lee Seo phthalate 10 mol ^_0/0 copolymerized poly ethylene terephthalate rate Toisofutareto (intrinsic viscosity 0.63), discharged melt through a spinneret having a circular spinning holes, cooling and solidifying the discharged fiber yarn After the application, an oil agent was applied thereto, and then an interlace was applied, followed by taking up and winding at a speed of 1400 mZ. The obtained undrawn fiber yarn is drawn at a preheating roller temperature of 87 ° C, a heat set heater (non-contact type) at a temperature of 200 ° C, a draw ratio of 2.9 times, and a drawing speed of 800 mZ. A high-shrinkable fiber yarn having a strength of 4.0 cN / dtex, an elongation of 37% and a shrinkage ratio of boiling water of 19% was produced.

The obtained high-shrink fiber yarn and low-shrink fiber yarn were aligned, and interlaced through an intermingling and entanglement treatment device and wound up to obtain a 145 dtex / 36 filament mixed yarn. The number of entangled fibers in the mixed yarn is 1 There were 40 per m.

The obtained mixed yarn is used for warp and weft, and woven into a double woven fabric. The woven fabric is refined (95 ° C), heat set (180 ° C), and reduced in alkali (95 ° C, The fabric was dyed (weight loss: 15%) and dyed (130 ° C, navy) to obtain a plain dyed fabric. The dyed fabric thus obtained was excellent in the feeling of creaking and gloss, and had a very good (excellent) swelling feeling and flexibility.

Example 7

Twisted yarn with a twist coefficient of 5000 was used on the 8/3 dtex (75 denier) 24 filament polyester irregular cross-section fiber yarn obtained in Example 1 and used as a warp yarn. Filament yarn 83.3dtex (75 denier) / 36 filament, twisted with a twist factor of 26000, used. Density: 115 yarns, Z2.54cm, weft density

: 89 plain fabrics of 2.54 cm were woven. This fabric is refined (95 ° C), relaxed (130 ° C), preheat set (190 ° C), weight loss processing (95., weight loss rate 20%), dyeing processing (130 ° C), Final heat set

(160 ° C) to produce a plain dyed fabric. The obtained fabric has excellent lightness and rough feeling of tussah silk like silkiness, furthermore, at the time of dyeing, less occurrence of uneven dyeing due to poor cloth passage of the dyeing solution, and a low density fabric. Despite the presence, no slip phenomenon was observed between the intersecting yarns. Industrial applicability

When the polyester modified cross-section fiber of the present invention is used, it has a silky feeling of wild silk that cannot be obtained when using the conventional modified cross-section fiber, and has properties such as silk-like luster, bulkiness, flexibility, and light weight. It is possible to obtain silk-like yarns and fabrics which are excellent in quality, and their industrial applicability is extremely high.

Claims

The scope of the claims

1. The cross-sectional shape of a single fiber containing polyester

(A) a triangular portion having a triangular shape;

(B) a flat protruding portion that is continuous with the top of the triangular portion and extends flatly therefrom;

Having, and

The following relations:

0.7≤ (L1 / L2) ≤3.0 (1)

as well as

3.0≤ (h2Xhl) ≤10.0 (2)

[In the equation (1),

L1 is a protruding tip of the flat protruding portion (B) from a midpoint of a connecting line connecting two connecting points of the contour of the triangular portion (A) and the contour of the flat protruding portion (B). Represents the distance to a point,

In the above formula (2),

hi represents the length of the connecting line between the triangular portion (A) and the flat protruding portion (B),

h2 represents the maximum width of the triangular portion (A) in a direction perpendicular to the longitudinal direction of the flat protruding portion (B).)

Satisfy

A polyester fiber having a modified cross section.

2. In the cross section of the single fiber, the following relational expression (3): (3) 2.0≤ (Ll / hl) The polyester irregular cross-section fiber according to claim 1, further satisfying the following.

3. The polyester modified cross-section fiber according to claim 1, wherein a hollow portion extending along a longitudinal direction of the fiber is formed in the triangular portion (A).

4. 0.5 to 2.5% by weight, based on the weight of the polyester forming the fiber, of the following general formula (1):

RS0 ₃ Mn (1) ''

[However, in the formula (1), R represents an alkyl group containing 3 to 30 carbon atoms, and one member selected from an aryl group and an alkyl aryl group containing 7 to 40 carbon atoms. M represents a member selected from an alkali metal and an alkaline earth metal, n represents 1 when M represents a monovalent metal, and 1 Z when M represents a monovalent metal. Represents 2)

The polyester fiber with a modified cross-section according to any one of claims 1 to 3, wherein a metal salt of an organic sulfonic acid represented by the following formula is blended.

5. The modified polyester fiber according to any one of claims 1 to 4, wherein the single fiber has a thick fine portion and a fine fine portion alternately formed in the longitudinal direction.

6. A polyester yarn comprising the polyester modified cross-section fiber according to any one of claims 1 to 5.

7. The polyester modified cross-section fiber has a thick fine portion and a fine fine portion alternately formed in the longitudinal direction thereof. 7. The polyester yarn according to claim 6, wherein a large fineness portion of individual pieces or more is distributed.

8. The lowest boiling water shrinkage fiber component comprising the polyester modified cross-section fiber according to any one of claims 1 to 5, A high boiling water shrinkage fiber component comprising at least one type of polyester fiber having a boiling water shrinkage higher than the boiling water shrinkage of the polyester deformed section fiber;

including,

A polyester blended yarn characterized by the following.

9. The difference in boiling water shrinkage between the polyester deformed section fiber for the lowest boiling water shrinkage fiber component and the polyester fiber contained in the high boiling water shrinkage fiber component and having the highest boiling water shrinkage is 4 to 40%. The mixed polyester yarn according to claim 7, wherein the mixed yarn is a polyester fiber.

10. Poriesu ether contained in the highest boiling water shrinkage polyester fiber, a port Li Echirente Refuta Relay Toys softer rate, As a isophthalic content of 5-15 moles of an acid of the dicarboxylic acid component ⁰ /. 9. The polyester mixed yarn according to claim 7 or 8.

11. The polyester fiber in which the highest boiling water shrinkage rate polyester fiber is a thick and thin fiber having a thick fine portion and a fine fine portion alternately distributed in the longitudinal direction thereof, and the polyester fiber containing the fine fiber portion has The polyester mixed fiber yarn according to any one of claims 8 to 10, wherein a fineness of at least 20 yarns / m is distributed.

12. A silk-like material comprising at least one yarn selected from the polyester yarn according to claim 6 and the polyester blended yarn according to any one of claims 7 to 11. A polyester fabric characterized by having a feeling.

13. The polyester according to claim 12, wherein said fabric is a woven fabric, said yarn is a twisted yarn having a twist coefficient of 2500 or more, and said twisted yarn is used as a warp of said woven fabric. Fabric.