JP2003119640A - Polyester combined filament yarn and method for producing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a polyester combined filament yarn using thick and thin ultrafine fiber as a sheath yarn, excellent in natural unevenness and further having soft spun like touch feeling and high-grade feeling and to provide a method for producing the blended yarn. SOLUTION: This polyester combined filament yarn is obtained by mutually interlacing a polyester filament yarn of a highly oriented undrawn yarn A having 1-5 dtex single fiber filament denier used as a core yarn with a thick and thin polyester highly oriented undrawn yarn B having <=1 dtex single fiber filament denier and thick and thin difference used as a sheath yarn each by loop and slackness. The polyester combined filament yarn has the distribution of yarn unevenness exhibiting 100-500/m total numbers of loop and slackness, 3-15% Uster irregularity U(%) and 6-25 cm peak value of spectrogram.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a polyester blend suitable for a knitted fabric material which has a visually natural surface effect, a soft texture and an easy dyeing property, and which has fine loops and tarmi on the yarn surface. The present invention relates to a textured yarn and a method for producing the same.

[0002]

2. Description of the Related Art Conventionally, in a bulky processed yarn obtained by subjecting a polyester highly oriented undrawn yarn (hereinafter referred to as POY) to a fluid treatment to form loops or slack, the softness using a fine yarn is used. A large number of mixed fiber processed yarns having various spun-like textures and methods for producing the same have been proposed.

For example, Japanese Patent Application Laid-Open No. 63-152433 proposes a fluid jet processed yarn using POY and drawn yarn, and a method for producing the same. However, since the textured yarn obtained by this method uses a drawn yarn having a lower dyeability than POY, the fluid jet textured yarn has a relatively low dyeability and has no characteristic surface change. Had a soft, spun-like texture, but lacked a luxurious feel.

In Japanese Patent No. 3021616, a polyester composite entangled yarn for fluid-treating a 1 to 5 dtex of a yarn called a normal OSP having a spinning speed of 6000 m / min or more and a highly oriented undrawn yarn having a spinning speed of 5000 m / min or less, and its production. A method has been proposed. However, the surface feeling of the obtained product is still plain, and since the sheath yarn having a low dyeing property peculiar to the ultrafine fiber is used, the product also lacks a high-grade feeling.

In JP-A-5-86535, a fluid-disturbing treatment is performed by using a highly shrinkable fiber yarn obtained by subjecting POY to a pre-drawing treatment and an ultrafine fiber yarn having a spinning speed of 6000 m / min or more. A method for producing a polyester bulk textured yarn has been proposed. This is aimed at a product with a high shrinkage yarn elasticity and a feeling of elasticity and a soft spanlike texture of the ultrafine fiber yarns by mixing the shrinkage difference between both yarns and the ultrafine fiber yarns. The surface feeling was plain and of low quality.

[0006]

SUMMARY OF THE INVENTION An object of the present invention is a technique capable of improving the quality level according to the prior art as described above, which has a visually natural surface effect and a soft peach-like spun-like texture. The present invention provides a polyester mixed fiber yarn having a high quality and a method for producing the same.

[0007]

In order to solve the above problems, the present invention is suitable for a knitted fabric which has an ultrafine yarn and is excellent in dyeability, super soft spun-like texture and natural surface effect. As a result of advancing the development of various materials, the present invention has been reached.

In order to solve the above problems, the present invention adopts the following configurations. That is, (1) the core yarn has a monofilament filament fineness of 1 to 5 dtex.
Highly oriented unstretched polyester filament yarn A
However, in the sheath yarn, polyester and highly oriented unoriented yarn B of thick and thin having a single-filament filament fineness of 1 dtex or less are intertwined with each other by loops and talumi, respectively, and the total number of loops and talumi is 10
0-500 pieces / m, Wooster unevenness value U (%) is 3-1
A polyester blended processed yarn having a yarn unevenness distribution of 5% and a spectrogram peak value of 6 to 25 cm.

(2) Polyester highly oriented undrawn yarn A having a single fiber filament fineness of 1 to 5 dtex, spun at a spinning speed of 6000 m / min or more, and a spinning speed of 500.
A highly blended polyester unoriented yarn B having a dtex of 1 dtex or less, which is spun at 0 m / min or less, is previously subjected to thick and thin processing, and then both fibers are subjected to fluid treatment at the same time. Production method.

(3) If the thick and thin processing ratio of the yarn B is E, then E = (1.7-0.0001 ×)
Vs) ± 0.2, The method for producing a polyester mixed fiber as described in (2) above. However, E
= Thick and thin draw ratio (times) Vs = Spinning speed (m / min)

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION To explain the yarn structure of the polyester mixed fiber yarn of the present invention with reference to the drawings, a yarn form model is illustrated in FIG. A is a core yarn portion and is 1 to 5d
It consists of polyester highly oriented undrawn yarns with tex. B is a sheath yarn portion, which is a polyester highly oriented unstretched yarn having a fineness of 1 dtex or less and having fine loops and tarmi, and is composed of thick and thin yarns.

The core yarn A and the sheath yarn B are entangled with each other by fluid such as air entanglement, and the core yarn A is a polyester mixed fiber processed yarn having a yarn structure which can be seen through the sheath yarn B.

The appearance of the mixed fiber yarn has a slight change in bulkiness in the yarn length direction. This is because the sheath yarn originally has a thick and thin yarn form, so that the portion corresponding to the thick portion of C is slightly thin and the portion corresponding to the thin portion of D is slightly thick. .

In the knitted or woven fabric product, the difference in the thickness causes a slight difference in the shade-like color difference in the gradation, a feeling of unevenness to the touch or a soft texture in the peach color, and a surface effect having a visually natural appearance is exhibited.

Regarding the yarn constitution of the polyester blended processed yarn of the present invention, the type of yarn is a polyester type filament yarn, and all polyester type filaments such as polyethylene terephthalate, polypropylene terephthalate, polytrimethylene terephthalate which are commonly used for bulky processed yarns. A thread is suitable and is not particularly limited,
Of course, the addition of the third component, a modified cross section, or a mixed fiber having a different fineness may be used. In particular, when used as a core yarn, a yarn cross-sectional structure having a side-by-side type joint between different polyester type polymers may be used. Also, it may be a conjugate fiber.
In this case, since it has a slight elasticity, it is possible to give a functional comfort feeling when worn.

The mixed fiber yarn has a core structure of 6000.
So-called OSP monofilament filaments spun at a high speed of not less than m / min are used. When the average fineness of the single fiber filament is a thick fiber having a dtex of 1 dtex or more, the feeling of tension and waist becomes strong, and the dyeability becomes high, which is preferable.
The most preferable range of use is -4 dtex.

If the core yarn fineness exceeds 5 dtex, the yarn forming ability of loops and talumi is reduced, and entanglement failure with the sheath yarn is likely to occur, which is not preferable.

In the thickness of the sheath yarn, generally, the thick portion is easily dyed in dark color and the thin portion is easily dyed in light color. However, since the average fineness of the present invention is thin, the whole is lightly colored, and fine loops and tarmi are easily formed. Therefore, in the knitted fabric, it is possible to obtain the effect of a softer spun-like texture.

Here, although the average fineness of the sheath yarn is thin, the thin portion is thicker than the thick portion, and this portion is deeply dyed. Therefore, even if the whole is a light color system, it partially has a dark dyed portion. Therefore, as a whole, it is difficult to see as a simple light color.

By arranging the polyester filament yarn B in the sheath portion in this way, it is possible to obtain the effect that the difference in shade of light and shade and the feeling of thick and thin unevenness are natural.

According to the measuring method used in the present invention, the total number of loops and talumi imparted to the polyester mixed fiber yarn of the present invention is preferably 100 to 500 / m.
When the number is less than 100 / m, the texture of slimy feeling becomes strong, and the spanlike texture and the bulkiness are deteriorated, which is not preferable.

On the other hand, if the number exceeds 500 pieces / m, on the other hand, loops and talumi are formed too much, and the yarn strength and the process passability are likely to deteriorate, which is not preferable. This number may be appropriately selected in consideration of the use and process passability.

The natural unevenness of the polyester blended processed yarn of the present invention is the Worcester Mura value U of the processed yarn.
(%) Is 4 to 15% and the peak value of the spectrogram is closely related to the distribution of 6 to 25 cm, and it was found that the knitted fabric is given a surface effect having a natural unevenness.

Here, the Wooster unevenness value U (%) is 4%.
If it is less than 0.1%, the surface effect of natural unevenness is weak, and if it exceeds 15%, the surface effect is strong. Therefore, it is unsuitable to obtain the desired surface effect, high-class feeling or elegance. Since the surface effect of natural unevenness varies depending on the yarn use, the structure or the application, it is important to appropriately select the Worcester unevenness value.

The Oostermura value, which is an index of the present invention, largely controls the visual comfort and natural feeling, and the combination of the length of the unevenness and the randomness is the most important.

The yarn unevenness distribution shape of the mixed fiber processed yarn of the present invention is
In the case of having a statistically normal distribution that is not unevenly distributed in the long side and the short side, a knitted fabric product exhibits a visually pleasing uneven pattern.

In the spectrogram showing the distribution of the yarn unevenness, the length cycle of the thick portion has a peak value within 5 to 30 cm, and within 8 to 20 cm, it is a preferable distribution that a natural surface effect can be obtained. .

If the distribution peak value of the spectrogram is less than 5 cm, the uneven pattern period will appear short, and if it exceeds 30 cm, the uneven pattern period will appear long, which deviates from the intended natural surface effect. However, since it can be applied to a special purpose, it may be out of the above range. Further, the peak value may exist in a plurality of places instead of one place.

Next, a detailed description will be given of the method for producing a polyester mixed fiber of the present invention. First, referring to FIG.
Shows an example of the manufacturing process. 6000 to be placed on the core yarn side
OSP of highly oriented undrawn yarn A spun at m / min or more
The yarn is unwound from the guide 1 and supplied to the feed roller 3.

POY of highly oriented undrawn yarn B having a dtex of 1 dtex or less spun at 5000 m / min or more, which is a sheath yarn, is unwound from the guide 2, supplied to the feed roller 4, and subjected to thick and thin processing with the hot pin 5. It is pulled out from the draw feed roller 6 and introduced into the fluid processing nozzle 7 which is aligned with the core yarn.

The highly oriented undrawn yarn A has a birefringence Δn of 100 to 130 × 10 ⁻³ , and the highly oriented undrawn yarn B has a birefringence Δn of 60 to 90 × 10. ^-3 can be applied.

The core yarn A may be watered before being introduced into the fluid treatment nozzle 7. A yarn feeding difference is provided between the yarn A and the yarn B subjected to the sick and thin drawing process, the fluid treatment is performed by the fluid treatment nozzle 7, and loops and tarmi are formed to pull out from the take-up roller 8.

The fluid treatment nozzle is of a disturbing type, and may be a so-called "Taslan" nozzle or an entangled nozzle, but the "Taslan" type is preferable.
Water may or may not be added during the fluid treatment. However, water addition is a preferred method because it has a higher ability to form loops and Talumi thread and is less likely to disappear.

After being pulled out from the take-up roller 8, the polyester mixed fiber yarn can be manufactured by directly winding the cheese 12 by the take-up roller 11.

The direct winding roller 11 is thus
Alternatively, the cheese 12 may be wound around, and the relaxation heat treatment may be performed by the heater 9 between the take-up roller 8 and the relaxation roller 10.

This roughening of the heat treatment partially shrinks the loops and talmis to evenly concentrate the bulky portions to make the yarn lines uniform, and in particular to improve the post-process passability such as weaving. However, it may be appropriately selected depending on the purpose.

Regarding the supply rate of the core thread and the sheath thread supplied to the fluid treatment nozzle, the supply rate of the yarn A is +3 to +15.
%, The supply rate of the yarn B is +5 to + 50%, and it is suitable to supply the yarn B to the fluid processing nozzle at the same time to perform the fluid processing.

If the supply rate of the yarn A is less than + 3%, the loop formation becomes less, and if it exceeds + 15%, the loop formation becomes too much and the thread passing property in the post-process such as the weaving process is deteriorated, which is not preferable.

Further, when the supply rate of the yarn B exceeds 50%, the number of loops and Talumi increases, but the number of loops and the like is excessively formed, which also deteriorates the yarn passing property in the subsequent step, which is not preferable. Of.

In relation to the supply rate of the yarn A and the yarn B, it is preferable that the yarn A is supplied in excess of the yarn B by at least 1% or more.

Next, the draw ratio of the yarn B in the thick and thin treatment greatly differs depending on the spinning speed, and the heating temperature of the hot pin is 70 to 140 ° C., but the draw ratio may be set within the range according to the following equation. It is preferable. That is, when the thick and thin processing magnification of the yarn B is E, E = (1.7-0.0001Vs) ± 0.2. However, E = thick and thin draw ratio (times) Vs = spinning speed (m / min) As the draw ratio increases, the highly oriented undrawn yarn approaches nearly complete drawing, and the surface effect of the obtained knitted fabric is plain. This is not preferable, and when it is low, on the contrary, it approaches incomplete drawing, resulting in a large residual elongation, leading to settling and disappearance of the loop, which is likely to cause deterioration in texture.

The draw ratio E (times) of thick and thin is P
It has a great relationship with the spinning speed (m / min) of OY, and it is preferable to set it in the above range when the spinning speed is 2000 to 5000 m / min. For example, the spinning speed is 300
If 0 m / min, E = (1.7-0.000
1 × 3000) ± 0.2 = 1.2 to 1.6. In order to form a large difference in thickness, R (times) is 1.3 to 1.
A preferable range is 5 times.

If the heating temperature of the hot pin is lower than 70 ° C. or higher than 140 ° C., the effect of forming thick and thin is weak, which is not preferable. As a heating device for the hot pin, a plate heater, a hollow heater, a saddle type heater, a hot pin or the like can be applied.

Further, by increasing the length of the thick and thin stretching process between the feed roller and the hot pin, the pattern of thick and thin differences becomes longer, and conversely, the pattern of short deviation shortens the pattern, so depending on the intended use. It may be set appropriately. As for the range of the actual length, in FIG. 2, the length between the hot pin 5 and the stretching roller 6 is preferably a stretched length of about 5 to 40 cm.

The core yarn A and the sheath yarn B are simultaneously applied to the fluid jet nozzle 7
Although air treatment is carried out at, the total number of A and B yarns is 2 or more, that is, 3, 4, 5 yarns, and the ratio is 1: 1, 1: 2, 1 : 3, 2: 3, etc. may be used.

Between the take-up roller 8 and the relaxing roller 10, a relaxing heat treatment may be performed by the heater 9. It is a preferred method for strengthening the binding force between the core yarn and the sheath yarn B, for shrinking a coarse loop to deform it into a fine loop, and for loosening and shrinking to enhance the dimensional stability of dyeing.

Although it is pulled out from the loosening roller 10, tension processing conditions may be used depending on the yarn type and fluid processing conditions.

[0048]

[Example] Measuring method (1) Yarn unevenness U% (%) EVENNESS TESTE manufactured by Keisokuki Kogyo Co., Ltd.
R 80 The yarn speed used was 25 m / min, norma · test was conducted for 5 minutes, and an average value of n = 3 was calculated. (2) Spectrogram peak value (cm) Same as above (3) Number of loops and number of Talumi (pieces / m) manufactured by Toray Engineering Co., Ltd. hairness-
Using a counter DT-104 type, the total number of loops and Talmi number of 0.35 mm from the yarn surface was measured, and an average value of n = 5 was calculated.

Example 1 85 spun at a spinning speed of 6000 m / min to form a core yarn
dtex / 24 highly oriented polyester unoriented yarn A (single fiber filament fineness 3.54 dtex, boiling water shrinkage 4.7%, elongation 38%) was used.

On the other hand, the spinning speed of the sheath yarn is 3000 m / m.
72 dtex / 72 highly oriented undrawn yarns B (single fiber filament fineness 1.0 dtex, hot water shrinkage 61%, elongation 165%) spun in 1 at a hot pin temperature of 80 ° C.
It was wound and stretched with thick and thin at a tension ratio of 1.45. The yarn unevenness U% in this case is 8.
9%, the spectrogram peak value was 13 cm.

The yarn feeding rate to the fluid treatment nozzle (nozzle type: T-311 manufactured by Heberline Co., Ltd.) was + 3% for the core yarn B and the sheath yarn A.
Was set to + 8%, and the fluid treatment was simultaneously performed at a fluid treatment pressure of 0.6 MP.

Then, the cheese was taken out at a take-up speed of 300 m / min, subsequently subjected to a relaxation heat treatment at a hollow heater temperature of 180 ° C. and a relaxation rate of + 0.3%, and wound on cheese. As a result, the fineness is 166 dtex and the hot water shrinkage ratio is 4.0.
%, Yarn unevenness U% 6.1%, and the number of loops was 443 pieces / m. The warp yarn is 85d
A plain weave fabric was manufactured by driving the weft yarns of tex / 36 polyester false twisted yarns.

Loom WJL (manufactured by Tsudakoma) 450 revolutions / min Warp yarn density 85 yarns / inch Weft yarn density 70 yarns / inch Texture Plain The obtained plain woven fabric was dyed and finished under the following conditions.

Scouring / Relaxing 40-98 ° C. × 60 min Intermediate set 160 ° C. Na treatment 18% weight loss dyeing processing 130 ° C. × 60 min Disperse dye finishing set 180 ° C. The polyester blended processed yarn fabric obtained has a natural thick and thin feel. And a product with a very soft-span-like texture due to the surface effect with a subtle color difference and fine and many loop formations was obtained.

[0055]

As described above, according to the present invention, the polyester blended processed yarn is a bulky yarn in which the polyester filament yarn is used as the core portion and the outer peripheral portion is entwined with fine loops of fine chic and thin or Talmi as a sheath yarn. As it has a morphology, when applied to knitted fabrics, it gives a high-class product with a high-quality soft-spun-like touch and excellent texture such as firmness and waist, or a natural shading-like unevenness of light and shade. be able to.

The core part is covered with the sheath part, but when the knitted fabric is formed, the dark part of the sheath part shows a subtle surface change,
It is possible to obtain a product in which refinement is added to the desired natural unevenness.

Although ultrafine fibers are used for the sheath portion, if relaxation treatment is applied after the fluid treatment, the dyeing property is increased, so that the white dyeing property is improved.

The sheath yarn is an ultrafine fiber having a dtex of 1 dtex or less and has a soft texture. However, since the number of loops formed by the fluid entanglement process is large and many fine loops are formed, the texture of a peach-touch surface is added to the softness. It is a great effect.

If the ultrafine fibers are 1 dtex or less, it is generally difficult to dye them in a dark color when they are usually dyed, because they are fine. However, since the present invention has a chic portion, it is characterized in that the whole portion visually appears to be deeply dyed due to the portion.

If the fibers having an ultrafine diameter of 1 dtex or less are not subjected to thick and thin processing at all, although the composite processed yarn is formed, the yarn strength is greatly reduced and fluffing frequently occurs, resulting in frequent yarn breakage, which makes it extremely difficult to form a fabric.

Further, if fibers with an ultrafine diameter of 1 dtex or less are completely stretched, it is not possible to dye them in a dark color, but the number of loops will be reduced and the texture will be slightly hardened, and there will be no unevenness, and high-quality products will be obtained. Inappropriate.

[Brief description of drawings]

FIG. 1 shows an example of a polyester blended processed yarn of the present invention, where A is a core yarn, B is a sheath yarn, C is a low bulk portion of the sheath yarn,
D is a bulky part.

FIG. 2 is a process chart showing an example of a method for producing a polyester mixed fiber yarn of the present invention.

[Explanation of symbols]

A: Highly oriented undrawn yarn B: Highly oriented undrawn yarn 1: Guide 2: Guide 3: Feed roller 4: Feed roller 5: Hot pin 6: Stretching roller 7: Fluid treatment nozzle 8: Take-up roller 9: heater 10: Relaxing roller 11: Take-up roller 12: cheese

Claims (3)

[Claims] 1. A single fiber filament having a fineness of 1 to 5 d in the core yarn.
tex is a highly oriented unstretched polyester filament yarn A, and a sheath yarn is a thick and thin polyester highly oriented unstretched yarn B having a single fiber filament fineness of 1 dtex or less. Are entangled with each other, the total number of loops and talumi is 100 to 500 / m, and the Wooster unevenness value U (%) is 3
~ 15%, spectrogram peak value 6-25 cm
A polyester blended processed yarn having a yarn unevenness distribution indicating 2. A polyester highly oriented undrawn yarn A having a filament fineness of 1 to 5 dtex spun at a spinning speed of 6000 m / min or more, and a spinning speed of 5000 m / min.
A method for producing a polyester blended yarn, which comprises subjecting a polyester highly oriented undrawn yarn B having a fiber density of 1 dtex or less spun at a speed of min or less to a thick and thin process in advance, and then subjecting both yarns to a fluid treatment at the same time. . 3. If the thick and thin processing magnification of the yarn B is E, then E = (1.7−0.0001 × Vs)
It is ± 0.2, The manufacturing method of the polyester mixed-fiber processed yarn of Claim 2 characterized by the above-mentioned. However, E = thick and thin draw ratio (times) Vs = spinning speed (m / min)