JPH07324239A - Polyester-based combined bulky textured yarn - Google Patents

Abstract

PURPOSE:To obtain polyester-based combined bulky textured yarn having excellent darkly dyeing effect, proper swelling and stable qualities, suitable as yarn for weaving and knitting. CONSTITUTION:This polyester-based combined bulky textured yarn is polyester interlaced yarn which is obtained by mixing crimped filament yarn A with not crimped drawn yarn B and has fluff and slack. The yarn A is composed of filaments amounting to >=50wt.% birefringence ratio (DELTAn) of the interlaced yarn, has low degree of orientation of <=110X10<-3> and an uneven shape or fine pores on the surface. The yarn B has hot water shrinkage percentage larger than that of the yarn A by >=5%. The interlaced yarn has >=150g tenacity as stress at 10%, elongation as the whole yarn and deeply dyeing properties with <=11.0L value of dyeing of cloth.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a polyester composite bulky processed yarn which is excellent in deep dyeing effect and has a suitable bulge and is suitable as a yarn for a woven or knitted fabric.

[0002]

2. Description of the Related Art With the recent trend toward higher grades, there has been a demand for a differentiated processed yarn having an excellent deep dyeing effect as seen in formal black and the like. For this reason, when simultaneously drawing and false-twisting an undrawn yarn, a method has been tried in which the draw ratio is made as low as possible and false-twisting is performed to suppress the orientation of the yarn and obtain a processed yarn with an improved deep dyeing effect. ing.

However, when the draw ratio is lowered, yarn breakage occurs due to ballooning in the normal pin type false twisting method, and in the friction type, the twisting effect is deteriorated due to the low tension, and so on. However, it is difficult to obtain a false twist crimped yarn with a low degree of orientation.

Therefore, as a twisted body in place of the pin type or friction type, a method of false twisting using a fluid swirling nozzle has been proposed, and the inventors of the present invention have also proposed a method of false twisting.
In the publication No. 214431, a method was proposed in which a fluid swirling nozzle was used as a twisting body, and false twisting was performed without drawing undrawn yarn. With this method, a false twisted yarn with a low degree of orientation and an excellent deep dyeing effect can be obtained, but on the other hand, the number of false twists is small, resulting in a low crimped yarn. There was a drawback that the "deepening" phenomenon appeared and the deep dyeing effect was halved. Furthermore, since the low-crimped yarn obtained by the above method is false twisted without being drawn, the yarn is easily stretched due to the tension received during the weaving preparation step and during weaving, and therefore the quality is improved. It was not possible to obtain a stable fabric.

Further, there have been proposed many methods of subjecting a textured yarn obtained by subjecting a polyester highly oriented undrawn yarn to a simultaneous drawing and false twisting process to perform fluid injection treatment. However, since the processed yarn obtained by these methods has entanglement and dense loop fluff, it improves the sizing property and improves the unwinding property from the wound body, and a span-like bulge is obtained.
There was a problem that there was no deep dyeing effect.

[0006]

DISCLOSURE OF THE INVENTION The present invention solves the above-mentioned problems of the prior art and is a polyester suitable as a yarn for a woven or knitted fabric, which has an excellent deep dyeing effect, has an appropriate bulge, and has stable quality. It is a technical object to provide a system-based composite bulky processed yarn.

[0007]

Means for Solving the Problems As a result of intensive studies to solve the above-mentioned problems, the present inventors have adopted, as a yarn having crimps, a yarn having a special shape on the surface of filament. ， When mixed with highly shrinkable drawn yarn,
The present invention has been achieved by finding that the "shiny" phenomenon of the fabric is eliminated, the L value of the dyed fabric is improved, and the processed yarn has stable quality.

That is, the present invention is a polyester entangled yarn having a crimped filament yarn A and a non-crimped drawn yarn B, which have loop fluff and slack, and the yarn A is the entangled yarn. Of the birefringence (Δ
n) has a low degree of orientation of 110 × 10 ^-3 or less, and is composed of filaments whose surface has irregularities or fine pores.
The yarn B has a hot water shrinkage ratio of 5% or more than that of the yarn A, and the strength of the entangled yarn at 10% elongation is 150 g or more, and the dyed L value of the fabric is 11.0 or less. The gist of the present invention is a polyester-based composite bulky processed yarn characterized by having deep dyeability.

The present invention will be described in detail below.

The bulky processed yarn of the present invention is composed of a crimped filament yarn A and a non-crimped drawn yarn B.
Each filament has a form in which it is complicatedly bent and mixed and entangled, and loop fluff and slack are formed on the yarn surface. Due to such a yarn form, voids are formed between filaments, the filaments have an appropriate bulge, and a span-like feeling can be expressed by loop fluff and slack. In addition, the complex internal refraction between filaments reduces the amount of diffused light that is reflected to the outside, increasing the color depth and improving the deep dyeing effect.

Further, one of the features of the present invention is that the crimped filament yarn A constituting the yarn has a birefringence (Δn) of 110
It has a low orientation physical property of × 10 ^-3 or less, preferably 100 × 10 ^-3 or less. Normally, when untwisted yarn is subjected to simultaneous drawing and false twisting, a birefringence index (Δn) of 150 × 10 ^-3 or more is obtained, and the degree of orientation increases, making it difficult for the dye to enter the fiber. The effect cannot be expected. However,
The birefringence (Δn) of the yarn A is 110 × 10 ⁻³ or less, that is,
Since it is a low orientation yarn that suppresses the progress of orientation as much as possible, the dye exhaustion rate is high, and the deep dyeing property is significantly improved, and the yarn A is 5% less than the non-crimped drawn yarn B. Due to the low shrinkage, the composite bulky yarn is positioned on the surface side by heat treatment such as dyeing, and a deep dyeing effect can be imparted to the complex bulky yarn.

The next feature of the present invention is that the surface of the filament forming the yarn A has fine irregularities or microcrater-like fine holes. The concavo-convex shape or the fine pores in the present invention means a minute one in a unit of μm, and does not mean a simple cross-sectional shape of a thread of irregular cross section (triangular cross section, hexagonal cross section, etc.). The above surface shape is
Although it may be present at the stage of the composite bulky processed yarn, it may be formed in the state of a fabric after being knitted and woven.

Yarn A located on the surface side of the composite bulky yarn
When the fiber surface is irradiated with light, the irregular surface shape causes irregular reflection of the light and the light is absorbed inside the fiber and is less reflected to the outside. There is an effect of becoming. Therefore, it is possible to eliminate the "shininess" of the cloth and to express a deep hue.

The above-mentioned yarn A has the property of being easily stretched,
If the yarn A is used alone, the yarn is stretched by the tension received in the subsequent process, the yarn orientation is advanced, the deep dyeing effect is halved, and the yarn becomes unstable in quality. Therefore, the composite bulky yarn of the present invention is a yarn in which the yarn A and the non-crimped drawn yarn B are mixed and entangled in order to prevent the elongation of the yarn A and the deterioration of the deep dyeing property due to the elongation. . Yarn A and yarn B are mixed,
In the entangled composite bulky yarn, the yarn A is 50% by weight.
As described above, it is necessary to occupy preferably 60% by weight or more, and if the composition ratio of the yarn A is less than 50% by weight, the deep dyeing effect is lowered, and it is difficult to eliminate "shine".

Further, the hot water shrinkage rate of the yarn B mixed and entangled with the yarn A must be larger than that of the yarn A by 5% or more. By making the hot water shrinkage rate of the yarn B 5% or more higher than that of the yarn A, when the yarn A is subjected to heat treatment such as dyeing, the deeply dyeable yarn A floats on the surface side of the composite bulky processed yarn, and the mixed fiber It is possible to prevent the reduction of the deep-dyeing effect due to and to amplify the bulge of the yarn.

Furthermore, the composite bulky yarn of the present invention is 10%
It is necessary that the stress during stretching has a strength of 150 g or more. If the stress at 10% elongation is less than 150 g, the yarn is stretched by the tension received during the weaving preparation process and during weaving, and a fabric of stable quality cannot be obtained.

As described above, the composite high-loft textured yarn of the present invention, after being woven or knitted into a fabric by the synergistic effect of the fiber characteristics of the filaments constituting the yarn and the yarn form,
If dyed with a black dye, L value is 11.0 or less, preferably 1
It has a deep dyeing property of 0.0 or less, eliminating "shiny",
In addition, it is difficult to grow in the post process and the quality of the processed yarn is stable.

In the present invention, the polyester forming the yarns A and B is preferably polyethylene terephthalate (PET) or a copolyester having PET as a main component.

Next, an example of the method for producing the polyester composite bulky finished yarn of the present invention will be described.

First, the undrawn yarn, which is the supply yarn for the crimped filament yarn A, has a birefringence (Δn) of 20 × 10 ⁻³ to 80 ×
It is preferred to use those of 10 ⁻³ . Birefringence (Δn)
Is less than 20 × 10 ^-3, it is not preferable because the physical properties change significantly over time, resulting in quality variations and fusing during false twisting. On the other hand, when it exceeds 80 × 10 ⁻³ , the deep dyeing processed yarn aimed at by the present invention cannot be obtained.

As described above, the composite bulky processed yarn of the present invention has irregularities or fine pores on the surface of the filament constituting the yarn A, but the supply yarn itself does not necessarily have this shape. However, the surface shape may be changed by post-treatment (alkali weight reduction processing) from the processed surface when the composite bulky processed yarn of the present invention is formed or before the cloth is dyed and processed. The method of allowing is preferred.

In order to change the surface shape of filaments by treating with a solvent such as alkali, a method of spinning polymers having different solubilities by a composite spinning method to remove easily soluble components and deforming them, or polymerization of polyester At the time of spinning or spinning, a method of adding fine particles inactive to polyester and spinning, and removing the fine particles by alkali weight reduction processing to form fine pores can be adopted.

In the former method of removing the easily soluble component and deforming the surface of the filament into an uneven shape, it is preferable that the width and height of the unevenness have a minute width of several μm. It is preferably 15 or more and more. further,
The arrangement distribution and the shape of the uneven portion are not particularly limited. For example, as in the cross section of the filament shown in FIG. 1, convex and concave portions are alternately and substantially evenly distributed on the surface, and the cross section of the convex portion is A rectangular shape or a substantially trapezoidal shape can be used.

In the latter method for removing fine particles, the content of fine particles is 1 to 15% by weight of polyester,
Fine particles having a particle size of 2 μm or less are preferable, but may be in a range that does not cause a trouble during spinning. Then, if the fine particles on the filament surface are removed by alkali reduction processing, microcrater-like fine holes can be formed. The type of fine particles used above is not particularly limited, but inorganic compounds such as ceramics, for example, oxides of barium, calcium, magnesium, aluminum, etc., sulfates, carbonates, phosphates, silica, etc. Can be preferably used.

Further, the non-crimped drawn yarn B has a fineness, a high elongation and a hot water shrinkage ratio so as to satisfy the constitution of the composite bulky processed yarn of the present invention in consideration of the physical properties of the yarn A. It is necessary to select it in consideration of the above, but it is preferable that the strength is 5 g / d and the elongation is 30% or less.

Next, an undrawn yarn having irregularities or fine pores on the surface of the filament described above or an undrawn yarn having the above-mentioned shape after post-treatment (alkali weight reduction processing) is used as a supply yarn for the yarn A, An example of manufacturing the polyester-based composite bulky yarn of the present invention in the manufacturing process shown in FIG.

In FIG. 2, the undrawn yarn 1 is supplied to the false twisting region between the first supply roller 2 and the first take-up roller 5 by the first supply roller 2 and twisted by the fluid swirling nozzle 4. Heat is set by the heater 3. Next, the yarn that has passed through the first take-up roller 5 is subjected to a fluid jetting process by the fluid jet nozzle 7 together with the yarn B that is supplied by the second supply roller 8, and then passes through the second take-up roller 6 and is packaged in the package 9. It is rolled up.

As described above, the false twisting process is performed by the fluid swirling nozzle. At this time, the false twisting process is performed without stretching the undrawn yarn, so that the birefringence (Δn) is 110 × 10 ⁻³ or less. Which is a low orientation crimped filament yarn A. Then, the yarn A and the yarn B are subjected to fluid treatment with a fluid jet nozzle to impart entanglement and loop fluff, and the polyester-based composite bulky yarn of the present invention is obtained.

Specific processing conditions during false twisting are as follows:
For example, at a processing speed of 300 m / min, the overfeed rate is 0 to 10%, the heater temperature is 200 to 220 ° C, the false twist coefficient (number of false twists × yarn denier ^1/2 ) 12000 to 15000, the air pressure of the fluid swirling nozzle. It is preferably ³ to 5 kg / cm ² . In addition, the conditions for fluid treatment are: overfeed rate 8 to 15%, air pressure 5
~ 7 kg / cm ² is preferred.

The L value of the dyed cloth referred to in the present invention is measured as follows. First, knit the yarn into a tubular fabric,
Then, dyeing is performed according to the following dyeing recipe. <Dyeing prescription> Scouring Scouring agent: Sanmor FL (manufactured by Nichika Chemical Co., Ltd.) 2
g / liter Temperature x time: 80 ° C x 20 minutes Alkali weight loss Caustic soda: 40 g / liter Temperature x time: 98 ° C x 30 minutes Dyeing colorant: Dianix Black HG-FS
15% owf (manufactured by Mitsubishi Kasei Co., Ltd.) Auxiliary agent: Nikka Sunsalt RZ-8F 0.5
g / liter (Nichika Chemical Co., Ltd.) Acetic acid 0.2 cc / liter Bath ratio: 1:50 Temperature x time: 135 ° C x 30 minutes Washing Purification reducing agent: Bisnol P-705
g / liter (Made by Yatsusha Yushi Kogyo Co., Ltd.) Temperature x time: 80 ° C x 20 minutes

The L-value is the value obtained by measuring the reflectance of a cylindrical knitted fabric dyed with the above dyeing recipe with an MS-2020 type spectrophotometer manufactured by Markbeth Co., and obtaining the density index from the color difference formula of CIE lab. , L value becomes deeper as the value is smaller.

[0032]

EXAMPLES Next, the present invention will be specifically described by way of examples.

Example 1 PET was used as the difficult-to-dissolve component, and 5-sodium sulfoisophthalic acid was 2.5 mol% as the easily-dissolvable component.
12% by weight copolymerization of 7,000 polyethylene glycols P
As shown in Fig. 1, using ET, the spinneret was designed so that the easily-eluted component becomes a core-sheath structured yarn in which the easily-eluted component is divided into a plurality of gears in the circumference of the fiber as shown in Fig. 1. Spinning was performed using a composite spinning device. The undrawn yarn (140d / 48f) having a birefringence index (Δn) of 60 × 10 ^-3 was used as the supply yarn for the crimped filament yarn A, while the non-crimped drawn yarn B was used. Using PET stretched yarn (75d / 24f) with an elongation of 25%, a strength of 5.5g / d and a hot water shrinkage of 9%, the false twisting process and the fluid treatment were performed under the conditions shown in Table 1 according to the manufacturing process of FIG. , A composite bulky yarn was obtained.

The obtained composite bulky yarn had the physical properties shown in Table 1 and was a mixed fiber entangled yarn having loop fluff and slack formed on the yarn surface. After this yarn was knitted into a tubular knitted fabric, the easily-eluted component of the yarn A was removed by alkali reduction processing by a conventional method to obtain a composite bulky processed yarn of the present invention. After the elution, the filament surface has 1 μm wide and 2.5 μm high protrusions.
There were 32 pieces, and they had uneven shapes. afterwards,
The tubular knitted fabric was dyed with a black dye, and the L value was measured.
At a value of 10.5, it had a deep black color, and there was no "shiny" phenomenon, and the deep dyeing effect was excellent. When the obtained processed yarn was subjected to a weaving preparation step and weaving, the yarn was not stretched and a fabric with stable quality was obtained.

Example 2 Calcium carbonate having an average particle size of 0.2 μm was used as fine particles of 5.5.
PET unstretched yarn (110d / 36f) having a birefringence (Δn) of 56 × 10 ⁻³ , which is contained by weight%, is used as the supply yarn for the yarn A, while the non-crimped stretched yarn B is used. Elongation 23%, Strength 5.4g /
d, using PET stretched yarn (50d / 12f) with hot water shrinkage of 10%,
According to the manufacturing process of FIG. 2, the composite bulky processed yarn was obtained by processing under the conditions of Table 1.

The obtained composite bulky yarn has the physical properties shown in Table 1 and is a mixed fiber entangled yarn in which loop fluff is formed on the surface of the yarn. In the same manner as in No. 1, alkali reduction processing and dyeing finishing processing were performed. Fine particles were removed from the filament surface after alkali reduction, and numerous microcrater-like micropores were formed. The L value after dyeing was as low as 10.3, and the bathochromic property was further improved. When the obtained processed yarn was subjected to a weaving preparation step and weaving, the yarn was not stretched and a fabric with stable quality was obtained.

[0037]

[Table 1]

[0038]

According to the present invention, due to the synergistic effect of the characteristics (physical properties and surface shape) of the filaments constituting the yarns A and B and the yarn form peculiar to the mixed fiber entangled yarn, an appropriate swelling and deep dyeing are obtained. In addition to providing deep fabric with excellent properties,
It is possible to provide a polyester-based composite bulky processed yarn that is free from the "shiny" phenomenon and that is stable in quality and suitable as a yarn for a woven or knitted fabric.

[Brief description of drawings]

FIG. 1 is a schematic cross-sectional view showing an example of a filament surface constituting a polyester-based composite bulky yarn of the present invention.

FIG. 2 is a schematic process drawing showing an example of a method for producing a polyester composite bulky finished yarn of the present invention.

[Explanation of symbols]

 1 Undrawn yarn for yarn A 3 Heater 4 Fluid swirl nozzle 7 Fluid jet nozzle 8 Package

Claims (1)

[Claims] 1. A polyester entangled yarn having a crimped filament yarn A and a non-crimped drawn yarn B mixed together and having loop fluff and slack, wherein the yarn A is 50% by weight of the entangled yarn. It is composed of filaments that occupy the above and have a low degree of birefringence (Δn) of 110 × 10 ^-3 or less and have a surface with irregularities or fine pores. The hot water shrinkage is 5% or more, the entangled yarn as a whole has a tenacity at 10% elongation of 150g or more, and has a deep dyeing property such that the dyed L value of the fabric is 11.0 or less. Polyester composite bulky processed yarn.