JPH09273043A - Spontaneously extensible polyester filament yarn, method for producing the same, and blended yarn containing spontaneously extensible polyester filament yarn - Google Patents

Abstract

(57) 【Abstract】 PROBLEM TO BE SOLVED: To provide a woven or knitted fabric with bulkiness and softness, and to give a feeling of fuzzy, which includes a spontaneously extensible polyester filament yarn suitably used for a heterogeneous shrinkage mixed filament yarn and a spontaneously extensible polyester filament yarn. Provides a mixed yarn that does not give a slimy feel. SOLUTION: This is elongated by dry heat treatment at 160 ° C after boiling water treatment, and has a width of 0.1 to 0.1 in the fiber axis direction during alkali weight loss.
A glass transition of a spontaneously stretchable polyester filament yarn in which streak grooves with a length of 3 μm and a length of 5 μm or more are formed on the fiber surface, and a highly oriented polyester unstretched filament yarn containing the metal salt of an organic sulfonic acid. It is obtained by performing a contact heat treatment under a tension of 0.02 to 0.12 g / d at a temperature of from 130 ° C to 130 ° C. Further, the spontaneously stretchable polyester filament yarn and the high-shrinkage polyester filament yarn are mixed into a mixed yarn.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a spontaneously extensible polyester filament yarn, a method for producing the same, and a mixed fiber containing the spontaneously extensible polyester filament yarn.

[0002]

2. Description of the Related Art Conventionally, as a method of imparting bulkiness and softness to a woven or knitted fabric, it has been known to use a different shrinkage mixed fiber yarn in which a low shrinkage filament yarn and a high shrinkage filament yarn are combined. However, the restraint of the texture of the woven or knitted fabric impeded the development of the difference in shrinkage, so that a satisfactory texture was not obtained. As a method for improving such a defect, Japanese Patent Laid-Open No. 1-25
In Japanese Patent No. 0425, JP-A-1-250433, etc., it is proposed to use a spontaneously extensible filament yarn as the low-shrinkable filament yarn, and to mix the spontaneously extensible filament yarn and the highly-shrinkable filament yarn in combination. .

The heterogeneous shrinkage mixed yarn obtained by this method gives the woven or knitted fabric a much better bulkiness and softness than the mixed yarn of the low shrinkage filament yarn / high shrinkage filament yarn. It is not preferable in that the loop formed by the spontaneously extensible filaments disposed on the sheath side of the mixed fiber by processing gives a feeling of stuffiness and a slimy feel.

[0004]

DISCLOSURE OF THE INVENTION An object of the present invention is to provide a self-expanding polyester filament yarn which is preferably used for a heterogeneous shrinkage mixed yarn and a woven or knitted fabric containing the self-expanding polyester filament yarn, which imparts bulkiness and a soft feeling. It is to provide a mixed yarn that does not give a feeling of stickiness, a feeling of stickiness, and a slimy feeling.

[0005]

The present invention has a shrinkage factor satisfying the following requirements (1) and (2), and has a width of 0.1 to 3 μm and a length in the axial direction of the fiber during alkali weight loss. 5 μm
Spontaneous stretchable polyester filament yarn, characterized in that the above-mentioned streak grooves are formed on the fiber surface at intervals of 5 μm or less, (1) SHD-SHW ≦ 0% (2) SHW ≦ 8% (where SHW is Boiling water shrinkage (%), SHD indicates dry heat shrinkage (%) at 160 ° C. after boiling water treatment)

In addition, ethylene-terephthalate is used as a main repeating unit, and the general formula R-SO ₃ M (R is a carbon number of 3 to
30 is an alkyl group, an aryl group having 7 to 40 carbon atoms, and M is an alkali metal).
The birefringence Δn contained in the range of 1 to 10% by weight is 0.03 to 0.
The highly oriented polyester unstretched filament yarn of No. 08 was heated to 0.02 at a temperature of glass transition temperature to 130 ° C. with a heater.
A method for producing a spontaneously extensible polyester filament yarn, which comprises performing a contact heat treatment under a tension of 0.12 g / d,

Further, the spontaneously stretchable polyester filament yarn A and the highly shrinkable polyester filament yarn B having a shrinkage ratio satisfying the following requirements (3) and (4) are included. A self-expanding polyester filament yarn-containing mixed fiber yarn in which A and a highly shrinkable polyester filament yarn B are mixed. (3) 10% ≤ SHW (B) ≤ 30% (4) SHW (B) -SHW (A) ≥ 10% (where SHW (A) is the boiling water shrinkage rate (%) of the spontaneously extensible polyester filament yarn A). , SHW (B) indicates the boiling water shrinkage rate (%) of the highly shrinkable polyester filament yarn B).

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION The spontaneously stretchable polyester filament yarn of the present invention comprises a polyester having ethylene terephthalate as a main repeating unit, and has a shrinkage ratio of 8% or less, preferably 0 to 6% when treated with boiling water. When the filament yarn treated with boiling water is subjected to dry heat treatment at 160 ° C. or higher, the filament yarn is elongated by the difference between the dry heat shrinkage rate and the boiling water shrinkage rate, and exhibits irreversible extension.

Further, in the spontaneously extensible polyester filament yarn of the present invention, when the alkali weight is reduced, a linear groove having a width of 0.1 to 3 μm and a length of 5 μm or more is adjacent to each other at an interval 5
It has an alkali-behavior performance of being formed on the fiber surface in the range of μm or less, and exhibits a dry feeling without sliminess due to the streak grooves formed on the fiber surface.

The spontaneously stretchable polyester filament yarn of the present invention is produced by subjecting a highly oriented polyester unstretched filament yarn containing an organic sulfonic acid metal salt to a contact heat treatment with a heater. As highly oriented polyester undrawn filament yarn, and the ethylene terephthalate as a main recurring unit, the general formula R-SO ₃ organic sulfonic acid metal salt represented by M 0.1 to 10 wt%, preferably 0.5 to 5 Highly oriented polyester unstretched filament yarn containing wt% is used. The metal salt of organic sulfonic acid becomes an active point of alkali weight loss at the time of alkali weight loss,
Striations are formed on the fiber surface. If the content of the organic sulfonic acid metal salt is less than 0.1% by weight, streak-shaped grooves are not formed, and if it exceeds 10% by weight, it is difficult to obtain an unstretched filament yarn satisfactorily in terms of spinnability. Becomes

The highly oriented polyester unstretched filament yarn used has a birefringence Δn of 0.03 to 0.08,
It is necessary that it is a highly oriented polyester undrawn filament yarn of preferably 0.04 to 0.06. When the birefringence Δn is less than 0.03, the orientation is insufficient, it is difficult to form streak grooves on the fiber surface when the alkali weight of the obtained filament yarn is reduced, and the birefringence Δn is 0.08. When it exceeds, the filament yarn obtained does not have spontaneous elongation in dry heat treatment.

Using such a highly oriented polyester unstretched filament yarn, 0.02 to 0.02 at a temperature of the glass transition temperature to 130 ° C. of the highly oriented unstretched filament yarn with a heater.
Contact heat treatment is performed under a tension of 0.12 g / d. A known arbitrary heater is used for the contact heat treatment, but thermal efficiency,
A contact heater is particularly preferably used in terms of cost. If the temperature is lower than the glass transition temperature, the relaxation of the molecular strain inside the fiber does not occur and the shrinkage due to boiling water treatment becomes large, and if it exceeds 130 ° C, the crystallization and orientation of the fiber proceed too much, and it is difficult to express spontaneous elongation. Becomes

When the tension is less than 0.02 g / d, the contact becomes unstable and the heating effect becomes non-uniform, and the boiling water shrinkage ratio becomes high as a whole. When the tension exceeds 0.12 g / d, the fiber The orientation is too advanced and it becomes difficult to express spontaneous elongation.

FIG. 1 shows a process for producing the spontaneously extensible polyester filament yarn of the present invention. In the process of FIG. 1, highly oriented undrawn filament yarn (1) is supplied from a feed roller (2), heat-treated while being in contact with a heater (3), and wound by a winder (5) via a delivery roller (4). take.

The spontaneously stretchable polyester filament yarn of the present invention is stretched by dry heat treatment after boiling water treatment, and these boiling water treatment and dry heat treatment for expressing spontaneous stretching are carried out by alkali in the form of woven or knitted fabric. It may be applied in a subsequent step such as weight reduction processing or dyeing finishing.

Particularly, the spontaneously extensible polyester filament yarn of the present invention is particularly preferable when it is mixed with the high-shrinkage polyester filament yarn, because its characteristics are remarkably exhibited. The present invention also includes the following spontaneously extensible polyester filament yarn-containing mixed fiber yarn.

That is, the mixed filament yarn containing the spontaneously extensible polyester filament yarn of the present invention has a boiling water shrinkage ratio of 10 to 30% with the spontaneously extensible polyester filament yarn A.
And the difference in the boiling water shrinkage ratio of the filament yarn A is 10% or more
And a spontaneously extensible polyester filament yarn A and a highly shrinkable polyester filament yarn B.

When the boiling water shrinkage ratio of the highly shrinkable polyester filament yarn B is less than 10%, the difference in shrinkage between the highly stretchable polyester filament yarn B and the spontaneously stretchable polyester filament yarn A becomes insufficient, and the woven or knitted fabric cannot be made bulky. If it exceeds 30%, the woven or knitted fabric cannot be given a soft feeling due to excessive shrinkage. On the other hand, when the difference in shrinkage rate of boiling water is less than 10%, the difference in shrinkage during dyeing and the like is insufficiently expressed, resulting in a woven or knitted fabric having poor bulkiness and softness.

The highly shrinkable polyester filament yarn B may be a polyester filament yarn containing ethylene terephthalate as a main repeating unit, and the polyester filament yarn having shrinkability during the spinning process, but a copolymerization component such as isophthalic acid. A polyester filament yarn having a high shrinkage property is preferably used by copolymerizing.

In obtaining the mixed filament yarn containing the spontaneously extensible polyester filament yarn of the present invention, the spontaneously extensible polyester filament yarn and the highly shrinkable polyester filament yarn are made to have appropriate cross-sectional shapes, fineness constitutions and composition ratios, respectively. Mixing is performed using any known mixing means such as drawing, twisting, and fluid ejection. In addition, in the spontaneously extensible polyester filament yarn-containing mixed fiber yarn of the present invention,
In addition to the spontaneously stretchable polyester filament yarn and the high shrinkage polyester filament yarn, other filament yarns may be included.

The spontaneously extensible polyester filament yarn-containing mixed filament yarn of the present invention is woven or knitted into a woven or knitted product, and then subjected to any process, preferably alkali weight reduction processing, alkali weight reduction in dyeing finish, boiling water treatment and A filament constituting a spontaneously stretchable polyester filament yarn in which streak-like grooves are formed on the fiber surface by a dry heat treatment at 160 ° C. or more is mainly arranged on the sheath side of the mixed filament yarn, and constitutes a highly shrinkable polyester filament yarn. Is mainly arranged on the core side of the mixed fiber, and gives the woven and knitted fabric a bulky and soft texture with a full swelling feeling and a dry feeling without stickiness.

[0022]

The present invention will be described below in more detail with reference to examples. In addition, each characteristic value in an Example was measured by the following method.

<Boiling Water Shrinkage (SHW)> A 10-turn winding cassette having a yarn length of 1 m is prepared under a tension of 1/30 g per 1 denier, and a load of 1/30 × 20 g per 1 denier is applied to the initial cassette length. (L ₀ ) is measured. After immersing the skein in boiling water for 30 minutes in an unloaded state, a skein length (L ₁ ) is measured by applying a load of 2/3 g per 1 denier,
The shrinkage rate of boiling water is calculated from the following formula. SHW (%) = [(L ₀ −L ₁ ) / L ₀ ] × 100

<Dry Heat Shrinkage (SHD)> After measuring the boiling water shrinkage, the cassette was allowed to stand for 10 minutes under an unloaded condition at an ambient temperature of 160 ° C., and then the cassette length (L ₂ ) was measured. Calculate the shrinkage. SHD (%) = [(L ₀ −L ₂ ) / L ₀ ] × 100

Example 1 After the completion of the esterification reaction at the time of producing polyethylene terephthalate, 1% by weight of sodium alkylsulfonate having 15 carbon atoms was added to give an intrinsic viscosity of 0.7.
Polymer No. 1 with spinning temperature 285 ° C., spinning speed 2900
12 with a birefringence Δn of 0.046 after melt spinning at m / min
Highly oriented polyester unstretched filament yarn of 0 denier / 36 filament was obtained. This highly oriented polyester unstretched filament yarn is manufactured by Mitsubishi Heavy Industries, Ltd. false twisting machine LS
-6, yarn speed 100 m / min, heater temperature 120
Stretching was carried out at a temperature of 0 ° C. and a draw ratio of 1.10 by contacting a heater with a tension of 0.09 g / d for heat treatment.

The drawn yarn thus obtained has a boiling water shrinkage (SHW).
Is 3.8%, dry heat shrinkage (SHD) is 0%, 160 ° C
SHD-SHW contracted by -3.8%, that is, expanded by 3.8% by the dry heat treatment at 1, indicating spontaneous elongation. The obtained spontaneously extensible yarn is knitted into a knitted fabric, and the weight loss rate is 2
Alkali weight loss processing was performed under boiling to 0%, and dyeing finishing processing was further performed at 130 ° C. When the fiber surface of the obtained knitted fabric was observed by a scanning electron microscope, the width of the fiber was 0.1 to 0.1 in the fiber axis direction.
It was confirmed that streak grooves with a length of 3 μm and a length of 5 μm or more were formed on the fiber surface at intervals of 5 μm or less, and the knitted fabric was
It had a dry feeling.

(Examples 2 to 7 and Comparative Examples 1 to 6) Using highly oriented polyester unstretched filament yarn of 120 denier / 36 filaments having the amount of sodium alkylsulfonate and birefringence Δn shown in Table 1, Example 1 was used. Stretching was performed under the conditions shown in Table 1 in the same manner as in. Boiling water shrinkage of the obtained drawn filament yarn, shrinkage difference, alkali weight reduction processing in knitted fabric, measurement of texture after dyeing and finishing,
Table 1 shows the evaluation results.

[0028]

[Table 1]

(Example 8) A self-expanding yarn A obtained in Example 1 and a highly shrinkable polyester yarn B of 75 denier / 18 filaments having a boiling water shrinkage of 18% were manufactured by AT-Aki Co., Ltd. Using 501 machines, the overfeed rate was 8% and 4% respectively, the yarn speed was 200 m / min, and the air pressure was 4 kg.
/ Cm ² Taslan nozzle (T-31 manufactured by Hebaline Co., Ltd.
In 1), the fibers were mixed by air injection. Using the obtained mixed-fiber yarn, weaving into a woven fabric, alkali reduction processing under boiling, 1
It was dyed and finished at 30 ° C., and further dried and heat set at 180 ° C. The obtained woven fabric was bulky, soft, rich in swelling, and dry and dry.

(Examples 9 to 12, Comparative Examples 7 to 10) Table 2
As shown in Example 1, using a spontaneously elongating yarn A having a boiling water shrinkage and a highly shrinkable yarn B having a respective boiling water shrinkage,
The fibers were mixed in the same manner as in Example 8. Using the obtained mixed fiber, it was woven into a woven fabric, which was subjected to alkali weight reduction processing in boiling, dyeing finishing processing at 130 ° C., and further dry-heat set at 180 ° C. Table 2 shows the evaluation results of the obtained woven fabric.

[0031]

[Table 2]

[0032]

EFFECTS OF THE INVENTION The spontaneously stretchable polyester filament yarn of the present invention forms a linear groove on the surface of the fiber during spontaneous stretching and alkali weight reduction processing. A mixed fiber yarn formed by combining shrinkable polyester filament yarns gives a woven or knitted fabric a bulky and soft texture that is full of swelling, a feeling of stuffiness, and a dry feeling without sliminess.

[Brief description of drawings]

FIG. 1 is a process drawing of a spontaneously extensible polyester filament yarn of the present invention.

[Explanation of symbols]

 1 Highly oriented unstretched filament yarn 2 Feed roller 3 Heater 4 Delivery roller 5 Winder

Front Page Continuation (72) Inventor Yasuo Takada 4-60 Sunadabashi, Higashi-ku, Nagoya, Aichi Prefecture Mitsubishi Rayon Co., Ltd. Product Development Laboratory

Claims (3)

[Claims] 1. A linear groove having a shrinkage ratio satisfying the following requirements (1) and (2) and having a width of 0.1 to 3 μm and a length of 5 μm or more in the fiber axis direction during alkali weight reduction. Adjacent spacing 5
A spontaneously stretchable polyester filament yarn, which is formed on the surface of the fiber to have a thickness of less than μm. (1) SHD-SHW ≤ 0% (2) SHW ≤ 8% (where SHW indicates boiling water shrinkage (%), SHD indicates dry heat shrinkage (%) at 160 ° C after boiling water treatment) 2. Ethylene terephthalate as a main repeating unit, R-SO ₃ M (R is a carbon number of 3 to 30)
Is an alkyl group, an aryl group having 7 to 40 carbon atoms, and M is an alkali metal).
Birefringence Δn containing 10% by weight is 0.03 to 0.08
The highly oriented polyester unstretched filament yarn of 0.02 to 0.02 at a temperature of glass transition temperature to 130 ° C. with a heater.
A method for producing a spontaneously extensible polyester filament yarn, which comprises subjecting the material to contact heat treatment under a tension of 0.12 g / d. 3. A spontaneously stretchable polyester filament yarn A according to claim 1, and a highly shrinkable polyester filament yarn B having a shrinkage ratio satisfying the following requirements (3) and (4). A spontaneously extensible polyester filament yarn-containing mixed filament yarn, wherein the polyester filament yarn A and the highly shrinkable polyester filament yarn B are mixed. (3) 10% ≤ SHW (B) ≤ 30% (4) SHW (B) -SHW (A) ≥ 10% (where SHW (A) is the boiling water shrinkage rate (%) of the spontaneously extensible polyester filament yarn A). , SHW (B) indicates the boiling water shrinkage rate (%) of the highly shrinkable polyester filament yarn B).