JP3464385B2 - Polyester diversity yarn - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-mixture composed of two or more intermediate oriented polyester multifilaments having different boiling water shrinkage, breaking elongation (hereinafter simply referred to as "elongation") and natural draw ratio. The present invention relates to a yarn, and a method for producing a stretched heterogeneous-shrink mixed yarn, a bulky yarn, and a composite false-twisted yarn using the yarn as a starting raw yarn. Here, the “diversity mixed fiber” means a stretched different shrinkage mixed fiber, which is the starting raw yarn.
It means a mixed yarn that gives various products such as bulky yarn and composite false twisted yarn.

[0002]

2. Description of the Related Art Conventionally, as a means for obtaining a woven or knitted fabric rich in swelling and softness, a woven or knitted fabric in which a mixed yarn composed of a high shrinkage polyester multifilament and a low shrinkage polyester multifilament is arranged It is known that a relaxation heat treatment is performed in a subsequent step to cause a difference in the length of the leg due to the difference in the contraction to express a bulging feeling and a soft feeling.

In recent years, it has been proposed to use a polyester multifilament that spontaneously extends as a low shrinkage component, with the intention of increasing the above-mentioned difference in yarn length.
No. 5 and Japanese Patent Application Laid-Open No. 1-250433.

Further, in Japanese Patent Application Laid-Open No. 8-325878, a polyester multifilament to which spontaneous elongation is imparted by performing a relaxation heat treatment, specifically, a polyester intermediate oriented yarn and a highly shrinkable polyester multifilament, specifically, In particular, it is also proposed that the stretched yarn of polyester is aligned, supplied to an interlace nozzle under overfeed and mixed, and then subjected to relaxation heat treatment to impart spontaneous elongation to the intermediate oriented yarn and then heat-fixing. Has been done. According to this method, a fabric having an extremely bulging feeling can be obtained.

However, since all of the high shrinkage yarns used in these proposals are drawn yarns, a drawing process is premised, and after the interlacing treatment, a relaxation heat treatment for imparting spontaneous elongation is performed. Is required, and the two separate processes are indispensable after all. If the same mixed yarn can be obtained in any one of the steps, industrial advantages in terms of equipment space and cost are immeasurable.

[0006]

SUMMARY OF THE INVENTION An object of the present invention is to provide raw yarns (diversity mixed yarns) such as heterogeneous shrinkage mixed yarns, bulky yarns and composite false-twisted yarns that are comparable in texture to conventional ones. , In a more simplified process.

[0007]

Means for Solving the Problems The inventors of the present invention have conducted various studies to solve the above problems, and as a result, the intermediate oriented yarn of polyester to which an oriented crystal inhibitor has been added at the time of spinning is subjected to hot drawing We have identified a phenomenon that is difficult to predict from the conventional concept that spontaneous elongation is imparted only by subjecting it to one step of heat setting treatment.

The intermediate oriented yarn does not contain the oriented crystal inhibitor (or has a small content), but has a higher elongation than the intermediate oriented yarn spun at substantially the same spinning speed. By utilizing the characteristics that the natural draw ratio and / or the natural draw ratio and the lower boiling water shrinkage rate are utilized, the following diverse mixed yarns have been obtained.

Thus, according to the present invention, in a mixed yarn composed of two or more types of polyester multifilaments, both filaments are intermediate oriented yarns,
Here, one filament (FY-A) contains the oriented crystal inhibitor of the spun yarn and the other filament (FY-A).
A versatile mixed yarn is provided which has a lower boiling water shrinkage than B) but a high elongation or natural draw ratio.

The meaning of the versatile mixed yarn having the above-mentioned structure is to give various products such as a different shrinkage mixed yarn, a bulky yarn and a composite false twisted yarn by post-processing. This point will be described below.

(A) Heterogeneous Shrinkage Mixed Fiber When the above-mentioned diversity mixed yarn is subjected to hot drawing and heat setting, FY-A containing an oriented crystal inhibitor is given spontaneous elongation,
On the other hand, FY-B is a stretched yarn that is thermally highly shrinkable without being imparted with spontaneous stretchability. Therefore, unlike the conventional method, there is no need for the two steps of stretching and relaxation heat treatment,
The same heterogeneous shrinkage mixed yarn can be obtained only by the heat setting step.

(B) Bulky yarn This bulky yarn is of the type disclosed in JP-B-63-16494. In the present invention, in accordance with the disclosure of the above-mentioned publication, the diversity blended yarn is treated with a natural draw ratio (NDR-
Stretching is carried out at a stretching ratio of A) or less and exceeding the natural stretching ratio (NDR-B) of FY-B, and subsequently kept in a relaxed state. In this step, the stretching stress at the time of stretching is FY- as compared with FY-A.
It strongly hangs on B. Next, when the stretched yarn is placed in a relaxed state, FY-A and FY-B have different elastic recovery amounts, and the latter shrinks more than the former.
Is relatively located in the core portion, and a bulky structure in which FY-A is located in a loop shape around it is generated.

Conventionally, when obtaining this kind of heterogeneous shrinkage mixed yarn or bulky yarn, boiling water shrinkage ratio and NDR are different at different spinning speeds.
Different raw yarns of different types were prepared separately, and they were further combined by a entanglement means, and then subjected to a relaxation heat treatment and a stretching / relaxation treatment step. It can be obtained by a one-step method such as a Co-spun method or a spinning alignment method. Of course, both yarns may be separately wound at the time of take-up of the spun yarn, and mixed yarns may be mixed in the post-processing step.

(C) Composite false-twisted yarn This composite false-twisted yarn is disclosed in Japanese Examined Patent Publication Nos. 61-19733 and 61-61.
It has a core-sheath structure disclosed in Japanese Patent No. 19737.
In the present invention, according to the disclosure of the above publication, the multi-component mixed yarn is preferably subjected to the simultaneous drawing and false twisting process. At this time, as compared with FY-A, FY-B having a lower natural stretch ratio (NDR), and thus lower elongation, is used as a core portion, and FY is surrounded by it.
A composite structure is obtained in which the -A is entangled (typically wrapped in alternating strands).

Conventionally, when obtaining a composite false-twisted yarn of this kind, raw yarns having different elongations are prepared at different spinning speeds, and the yarns are further combined by entanglement means and then simultaneously drawn and false-twisted. In the present invention, such a compound yarn is obtained by a one-step method such as a co-spun method and a spinning and aligning method. Of course, both yarns are separately wound at the time of take-up of the spinning,
As in the case of (a) or (b), the mixed yarn may be mixed in the subsequent processing step.

The present invention will be further described in detail. The polyester referred to in the present invention is a polyester having ethylene terephthalate as a main repeating unit, but in order to improve its dyeability, anti-pill property, heat shrinkage property, etc., a small amount (usually 15 mol% or less, It may be a copolymer of a third component (preferably 10 mol% or less). If necessary, other polymers may be mixed in a small amount (usually 10% by weight or less based on the polyester). Further, an additive such as an electrostatic agent, a matting agent, an ultraviolet absorber and a dyeability improving agent may be blended.

The intermediate orientation yarn referred to in the present invention is 2000.
~ 5000 m / min, preferably 2500-4500 m / min
Mean spun yarn obtained under a spin-off speed of minutes.

On the other hand, the term "oriented crystal inhibitor during spinning" as used in the present invention means polymethacrylate (methacryl) or a derivative thereof, polyacrylate or a derivative thereof, poly (4-methyl-1-pentene), polyocta. Daisen-
1 or polyvinyl benzyl or its derivative etc. are illustrated. Among them, polymethylmethacrylate or poly (4-methyl-1-pentene) is a preferable example.

The above-described oriented crystal inhibitor is a kind of polymer, and preferably has an average molecular weight of 1,000 or more.
In the case of a prepolymer or polymer having a molecular weight of 1000 or more, the effect of increasing the elongation of the undrawn yarn is recognized,
When the molecular weight is less than 1000, the effect of increasing the elongation of the spun yarn is not so great because the effect of changing the molecular motion of polyester is not exerted. Ideally, the number average molecular weight in terms of styrene monomer is preferably about 20,000 to 40,000. As an example, "Kurapet SH-N" (Kuraray)
There is.

These oriented crystal inhibitors are added to the polymer before spinning the polyester, and the amount of addition is preferably 0.5 to 5.0% by weight based on the polymer. If it is less than 0.5% by weight, the desired elongation improving effect cannot be obtained. On the other hand, if it exceeds 5%, yarn breakage and winding on the take-up roller frequently occur in the spinning process, resulting in poor spinning condition. The mechanical properties such as strength and elongation of the steel also deteriorate. The addition method may be a method using a chip blender, or a polymer and an oriented crystallization inhibitor may be added in advance after forming a master chip.

The versatile mixed yarn of the present invention can be advantageously obtained by the cospan method or the spinning alignment method. When the Cospan method is used, a polymer containing an oriented crystal inhibitor and a polymer substantially free of the agent may be discharged from separate discharge (nozzle) holes in the same die. On the other hand, in the spinning alignment method, a polymer containing an oriented crystal inhibitor and a polymer containing substantially no such agent are discharged from different spinnerets, cooled and solidified, and then both discharged yarns are interlaced. It may be wound after being mixed with a yarn mixing means. Of course, as shown in the embodiment of FIG. 1 described later, a polymer containing an oriented crystal inhibitor and a polymer substantially free of the agent are discharged from different spinners, cooled and solidified, and further wound into separate packages, and after that Before processing, the fibers may be mixed by a compounding means such as an interlace to form a diversity mixed fiber.

When this multi-purpose mixed yarn is used for producing the stretched heterogeneous shrinkage mixed yarn, isophthalic acid and bisphenol A are used as the polymer substantially free of the oriented crystal inhibitor. It is preferable to use a copolymerized polymer in which a diol component as a skeleton is copolymerized to improve heat shrinkability.

In the diversity mixed yarn obtained in this way, the characteristic features are the physical properties of FY-A, the elongation of which is 200 to 370%, and at least that of FY-B. It is higher than 50%. In terms of thermal characteristics,
The boiling water shrinkage rate (BWS) of FY-B is 45 to 65%, whereas that of FY-A is 5% or more lower.

Next, utilizing this multi-purpose mixed yarn,
(A) An example of stretched hetero-shrink mixed yarn, (b) Stretched bulky yarn, and (c) Composite false-twisted yarn will be described. FIG. 3 is a schematic front view showing an example of an apparatus for obtaining a different shrinkage mixed fiber. FY-A, which is given spontaneous elongation by heat stretching and heat setting, and FY-B, which has a larger heat shrinkage ratio than FY-A, are released from their respective packages and aligned to form the supply roll 1 and the first roll. The interlaced nozzle 3 provided between the No. 1 take-up roll 2 and the take-up roll 2 is entangled under the overfeed to form a diversity mixed yarn.

Here, the interlace treatment is for uniformly mixing both yarns. In this case, it is preferable that the overfeed rate is 1.0 to 1.5%. Also,
As the air injection nozzle, a commonly used pressure air type nozzle for interlace processing is suitable, and a Taslan processing nozzle can also be applied separately.

If desired, the multifilamentary mixed yarn after the interlace treatment may be wound up once, but it is usually advantageous to subsequently subject it to a heat drawing / heat setting treatment as shown in the drawing.

In this case, the first take-up roll 2 and the second take-up roll (drawing roll) 4 are both heated, during which the multi-component mixed yarn undergoes heat drawing and heat setting in one step. That is, the first take-up roll 2 functions as a preheating roll during stretching, and the second take-up roll 4 functions as a stretching roll and a heat setting roll. The multi-component mixed yarn after hot drawing and heat setting is wound into the package 6. As a winding method, a cheese winding method using a pan type or a resonance type stretching machine (stretching machine using step rollers) may be used.

In this embodiment, the hot drawing conditions mainly depend on the draw ratio, the heating temperature of each of the first take-up roll 2 and the second take-up roll 4, and the peripheral speed difference between both rolls. That is, it varies depending on the mixing ratio (% by weight) of FY-A and FY-B, filament denier, yarn denier, and further, what kind of yarn is used as FY-A.

For example, as FY-A, a methacrylic resin as an oriented crystal inhibitor is contained in an amount of 1.5% by weight based on the polymer, an intermediate oriented yarn obtained at a spinning take-up speed of 3000 m / min to 3500 m / min, and FY-A. As B, a heat-shrinkable polymer such as isophthalic acid copolyester is 3000 m
The first take-up roll (heating roll) when the yarn denier after drawing is set to 100 denier with a mixing ratio of 50/50 (% by weight) with the intermediate oriented yarn obtained at a spinning speed of 1 / min to 3500 m / min. The temperature of No. 2 is 80 ° C., the temperature of the second take-up roll 4 is 110 ° C., the draw ratio is 1.75 times, and the draw speed is 5.
It may be set to 00 to 600 m / min. As a result, the boiling water shrinkage ratio of the obtained heterogeneous mixed fiber yarn is usually 5 to 18%.
It will be about. As the heat fixing means, in addition to the illustrated non-contact plate heater 5, any one of a contact plate heater, a heated winding roll and the like may be used, but the heat fixing method using the heated second take-up roll 4 is particularly used. It is preferable in terms of simplification.

The heterogeneous shrinkage mixed yarn produced by the above steps is subjected to relaxation heat treatment in the form of a thread or a fabric, and FY-A.
The group of spontaneously extensible filaments obtained from No. 1 is relatively located outside the mixed yarn, and the group of heat-shrinkable polyester filaments obtained from FY-B is relatively located inside each mixed yarn. Therefore, in order to improve the texture, the filament denier of FY-A is set to 2 to 8 de, F
It is preferable to adjust that of Y-B to 3 to 10 de, and to adjust the former to be smaller than the latter. Also, FY
From the viewpoint of deep color and bulge, the mixed fiber ratio of -A and FY-B is preferably in the range of 8: 2 to 5: 5 by weight.

On the other hand, FIG. 2 shows a mode in which the multi-component mixed yarn obtained by cospan or the spinning and aligning method is directly released from the package and hot-drawn and heat-set as in the case of FIG.

Conventionally, as the high heat-shrinkable filament in the different shrinkage mixed yarn, the boiling water shrinkage ratio is obtained by drawing the undrawn yarn obtained at the spinning take-up speed of about 1400 m / min under the draw ratio of 3 to 4. Is 8.0% or more, and preferably, the boiling water shrinkage is 10.
~ 18% drawn yarn has been used.

On the other hand, in the present invention, the filament is, for example, after spinning a heat-shrinkable polyester polymer obtained by copolymerizing a diol component having isophthalic acid and / or bisphenol A as a skeleton at about 3300 m / min, A drawn yarn similar to the conventional one can be obtained by hot-drawing and heat-setting this at a low draw ratio of DR = 1.75.

The original yarn of the conventional different-shrinkage mixed-fiber yarn is produced by using two types of yarns having different shrinkage differences in different processes (one yarn is a high-speed spinning process for obtaining an intermediate oriented yarn, and the other yarn is a low-speed spinning process). A raw yarn was made in a process of further drawing the discharged yarn, and both yarns were mixed and then subjected to a relaxation heat treatment.

On the other hand, in the present invention, two kinds of yarns can be obtained by substantially the same spinning speed process, and both yarns after the mixing are only drawn and heat-fixed. The raw yarn can be obtained by the aligning method, and in the subsequent processing step, the conventional two steps of stretching and relaxation heat treatment are omitted in one step of the drawing heat setting.

(B) Bulky yarn This bulky yarn can be basically obtained by utilizing the process shown in FIG. 1 or 2. In this case, the setting of the draw ratio is important. As described above, the diversity blended yarn has a draw ratio between the first take-up roll 2 and the second take-up roll 4 which is equal to or less than the natural draw ratio (NDR-A) of FY-A and is FY-.
Stretching is carried out at a stretch ratio exceeding the natural stretching ratio of B (NDR-B). The stretching stress during this period is stronger on FY-B than on FY-A. Next, the yarn is placed in a relaxed state after the second take-up roll 4. For this purpose, the second take-up roll 4
Further, a roll that rotates at a lower peripheral speed than the roll may be installed downstream of the roll, and the drawn yarn may be placed in a relaxed state between these rolls. In this relaxation region, the stretching stress applied to the previous yarn is rapidly released. As a result, FY-A and F
Since the elastic recovery amount differs from Y-B and the latter shrinks more than the former, FY-B is located relatively in the core part, and FY-A has a bulky structure in which it is located in a loop shape around it. Occurs.

(C) Example of composite false-twisted yarn FIG. 3 is a schematic front view showing an example of an apparatus for obtaining the composite false-twisted yarn. FY-A that constitutes the sheath portion of the composite false twisted yarn obtained by performing simultaneous drawing and false twisting,
The FY-B constituting the core portion of the false twisted yarn is released from the respective packages, aligned, and entangled by the interlace nozzle 3 under overfeed of several% to obtain a diversity mixed yarn.

Next, the mixed yarn is passed through the supply roll 7 and the false twist applied by the false twisting tool 9 is heat-fixed by the heater 8, untwisted by the false twisting tool 9 and thereafter, and then combined by the take-up roll 10. Taken up as false twisted yarn. The composite false-twisted yarn that has exited from the roll may be wound as it is, but as shown in the figure, it may be subjected to a relaxation heat treatment by the secondary heater 11 and wound as a composite false-twisted yarn with reduced torque.

Conventionally, since the yarns corresponding to FY-A and FY-B require a difference in elongation between both yarns, 1000
The undrawn yarn obtained at a spinning take-up speed of about 1600 m / min and the intermediate-oriented yarn obtained at a take-up speed of about 2800-3600 m / min (aligned yarn or mixed yarn) were used. .

On the other hand, in the present invention, the above "10" is used.
FY-A corresponding to the "undrawn yarn obtained at a spinning take-up speed of about 0 to 1600 m / min" is a speed corresponding to the spinning take-up speed of FY-B and maintains the same elongation level as the undrawn yarn. However, since they are obtained as intermediate oriented yarns, both yarns can be obtained as intermediate oriented yarns at substantially the same spinning take-off speed, and therefore extremely advantageous in terms of manufacturing cost, equipment cost, and equipment space reduction. become.

[0041]

The present invention will be described in more detail with reference to the following examples. Inherent viscosity, boiling water shrinkage and spontaneous extensibility used in this case are as defined below.

Intrinsic viscosity: Polyester polymer in orthochlorophenol at various concentrations [C] (g / 100 m
The value [η] obtained by extrapolating [ηsp (specific viscosity) / C] to zero concentration measured at 35 ° C. for the dissolved solution was used as the intrinsic viscosity.

Boiled water shrinkage (BWS) The length (L) of a sample obtained by rotating the sample 10 times with a measuring instrument (circumferential length 1125 cm) was applied with a light load of 1/30 g per denier. To do. Next, hot water treatment is carried out at 95 ° C. for 30 minutes with the light load removed, and after drying, the length (L0) is measured again with the light load applied. BWS is [(L-L0)
/ L] × 100 (%).

Spontaneous extensibility: When the mixed fiber or the mixed fiber after the relaxation heat treatment is used as a cloth and pre-relaxed, it generally shrinks. Here, the self-height means that what is once shrunk grows in the subsequent treatment (shows the property that a specific component of the mixed fiber stretches in the preset treatment, the alkali treatment, and the post-treatment of the final set). As the evaluation method, mixed fiber was used and evaluated by the following method.

A mixed fiber yarn (eg, core-sheath structure yarn) is wound up by a manual measuring machine so that it is skeined to 3000 de. Load a 6g S-shaped weight on the skein and measure the length →
Wet heat 95 ℃, 30 minutes (12g load) → Wet heat 130 ℃, 3
A treatment of 0 minutes (12 g load) → dry heat at 190 ° C. for 5 minutes (12 g load) is performed, and the shrinkage rate is examined by the following method. The sample after the treatment was not used for the next treatment because a load was applied (n = 9 samples were prepared in total, n = 3 in each step).
use). L2 with 106g load on mixed fiber treated yarn (dry heat 190 ° C, 5min treated yarn) to check the shrinkage rate of core (shrinkable yarn)
I asked. The sheath yarn (self-extending yarn) is stretched by further applying a load by hand until it becomes a straight line, and the length L3 is measured, and the shrinkage rate (%) with respect to the length L1 after each treatment with wet heat at 95 ° C for 30 minutes (load of 12 g) Then, the self-expansion rate was calculated.・ Self-expansion rate (%) of core (shrinkable yarn) = (L2-L1) / L1 × 100 (%) ・ 〃 of sheath (self-expanding yarn) = (L3-L1) / L1 × 100 (%)

Example 1 Polyethylene terephthalate having an intrinsic viscosity of 0.64 was dried by a conventional method, and immediately before spinning, a methacrylic resin (Clapet SH-N color number 1000) was added to the polymer as an oriented crystal inhibitor. After chip blending at a ratio of 1.5% by weight, a spinneret with a nozzle hole diameter of 0.3 mm and a nozzle length of 0.6 mm was used.
Spinning was performed at a spinneret temperature of 282 ° C. and a spinning take-up speed of 3300 m / min to obtain a polyester intermediate oriented yarn (FY-A) of 87.5 de / 24 fil. The physical properties of this yarn are 1.2g strength
/ De, elongation 305%, NDR 133%, BWS41.
It was 9%.

On the other hand, polyethylene terephthalate / isophthalate copolyester having an intrinsic viscosity of 0.64 (10 mol% of terephthalic acid was replaced with isophthalic acid) was used with a spinneret having a nozzle hole diameter of 0.4 mm and a nozzle length of 0.8 mm. Spinning was performed at a spinneret temperature of 282 ° C. and a spinning take-up speed of 3300 m / min to obtain a polyester intermediate oriented yarn (FY-B) of 87.5 de / 12 fil. The physical properties of this yarn are strength 2.4 g / de, elongation 146%, NDR 52%, BWS
It was 57.7%.

Next, the above-mentioned FY-A and FY-B were mixed by the device shown in FIG. 1 and then stretched and heat-fixed to obtain a stretched different-shrinkage mixed yarn. At that time, both yarns were aligned, and the interlace nozzle 3 provided between the supply roll 1 and the first take-up roll (surface temperature 80 ° C.) 2 provided an overfeed rate of 1.2% at a speed of 282 m / min. Supply under 1.
Interlace was imparted by entanglement with a compressed air of 5 kg / cm ² to obtain a diversity mixed yarn.

Next, the multi-purpose mixed yarn is wound around the first take-up roll 2 (peripheral speed: 286 m / min, diameter: 8.9 cm) eight times and preheated (contact time 0.48 seconds). ),
The second take-up roll 4 having a surface temperature of 110 ° C. (peripheral speed: 50
0 m / min, diameter: 8.9 cm) was wound 8 times (contact time 0.28 seconds), and while being stretched at a stretch ratio of 1.75 between both rolls, heat-fixed by the second take-up roll 4 to package 6 Rolled up.

The physical properties of the obtained differently contracted mixed yarn are as follows:
It was 4 g / de, the elongation was 37.9% and the BWS was 16.5%.

This mixed yarn is woven into a plain weave having a warp of 60 yarns / cm and a weft of 35 yarns / cm, and is subjected to preliminary relaxation (wet heat 96 ° C.).
10 minutes), relaxing (wet heat 130 ° C 20 minutes), preset (dry heat 195 ° C 1 minute), alkali weight loss (95 ° C,
The weight loss was 20%), and after dyeing a green color at 130 ° C. for 1 hour by a conventional method, final setting (dry heat 180 ° C., 1 minute) was performed. The obtained dyed woven fabric was a carded-like woven fabric having a high resilience, a wool-like touch, and a swelling feeling.

Reference Example A drawn yarn obtained by treating FY-A only under the same conditions in the hot drawing / heat setting step of Example 1 was
It exhibited a spontaneous elongation of 5.6%.

Example 2 The same operation as in Example 1 was carried out except that the addition amount of the methacrylic resin was changed to 1.0% by weight. The physical properties of the obtained different-shrinkage mixed filament yarn were a strength of 2.9 g / de, an elongation of 38.2% and a BWS of 15.7%.

[Example 3] The same operation as in Example 1 was carried out except that the addition amount of the methacrylic resin was changed to 0.5% by weight. The physical properties of the obtained different shrinkage mixed yarn were as follows: strength 3.1 g / de, elongation 31%, BWS 12.1%.

[Fourth Embodiment] The first embodiment is the same as the first embodiment.
The same operation was carried out except that FY-A and FY-B were spun by the cospan method using the spinneret in which the two kinds of nozzle hole groups shown in (3) were used.

[Example 5] In Example 1, instead of the polyethylene terephthalate isophthalate copolyester, a copolyester having an intrinsic viscosity of 0.65 (4.0 mol% of terephthalic acid was isophthalic acid and ethylene glycol was used). Was replaced by bisphenol A diethylene glycol). The physical properties of the obtained different-shrinkage mixed yarn were strength 2.3 g / de, elongation 36.5%, and BWS 17.2%.

[Example 6] The same operation as in Example 1 was carried out except that the addition amount of the methacrylic resin was changed to 3.0% by weight. The physical properties of the obtained different-shrink mixed yarn were strength 2.2 g / de, elongation 36.0%, and BWS 17.5%.

Example 7 The same operation as in Example 1 was carried out except that the addition amount of the methacrylic resin was changed to 5.0% by weight. The physical properties of the obtained different shrinkage mixed yarn were as follows: strength 2.0 g / de, elongation 38.2%, BWS 18.2%.

Comparative Example 1 The same operation as in Example 1 was carried out except that the addition of the methacrylic resin was omitted. The physical properties of the obtained different shrinkage mixed yarn have a strength of 4.3 g / d.
e, the elongation was 29.3% and the BWS was 8.4%.

In the diversity mixed yarns obtained in Examples 1 to 7 and Comparative Example 1 above, the difference in elongation between FY-A and FY-B is shown in Table 1, and the NDR and BWS of each yarn are also shown. Table 2
Shown in.

[0061]

[Table 1]

(Note) Elongation difference: [Elongation of FY-A (%)]
-[Elongation of FY-B (%)]

[0063]

[Table 2]

[Embodiment 8] A polyethylene terephthalate chip having a peculiarity of 0.64 was blended with the methacrylic resin used in Embodiment 1 at a ratio of 1.5% by weight based on the weight of the chip, and the nozzle hole diameter was 0. Using a spinneret with a diameter of 0.3 mm and a nozzle length of 0.6 mm, the spinneret temperature is 282 ° C.,
Spinning at a take-up speed of 3300 m / min, 140 de / 4
An 8 fil polyester intermediate orientation yarn (FY-A) was obtained. The physical properties of this intermediate oriented yarn are as follows: strength 1.62 g / de,
The elongation was 290% and NDR was 116%.

On the other hand, a polyethylene terephthalate polymer having an intrinsic viscosity of 0.64 was fed from another spinning machine adjacent to the above spinning machine to a nozzle hole diameter of 0.4 mm and a nozzle length of 0.
Spinning was performed at a spinneret temperature of 282 ° C. and a spinning take-up speed of 3300 m / min using an 8 mm spinneret, and 115 de / 15 fi
l polyester intermediate oriented yarn (FY-B) was obtained.

Next, using the apparatus shown in FIG. 3, both yarns were fed at an overfeed rate of 2.0%, compressed air of 2 kg / cm ² , and a processing speed of 3
After interlace treatment under the condition of 25 m / min to make a diversity mixed yarn, the temperature of the heater 8 is 160 ° C., the triaxial friction disk is used as the false twisting tool 9, and D / Y = 1.9.
(D: peripheral speed of disk, Y: yarn speed), draw ratio 1.
Simultaneous drawing and false twisting were performed under 7 times.

[Example 9] The same operation as in Example 8 was carried out except that the addition amount of the methacrylic resin was changed to 1.0% by weight.

[Example 10] The same operation as in Example 8 was carried out except that the addition amount of the methacrylic resin was changed to 0.5% by weight.

[Example 11] In Example 8, except that FY-A and FY-B were spun by the Cospan method using the cospan die having the two kinds of nozzle holes described in Example 8 The same operation was performed.

[Example 12] The same operation as in Example 8 was carried out except that the addition amount of the methacrylic resin was changed to 3.0% by weight.

[Example 13] The same operation as in Example 8 was carried out except that the addition amount of the methacrylic resin was changed to 5.0% by weight.

[Comparative Example 2] The same operation as in Example 8 was carried out except that the addition of the methacrylic resin was omitted.
Among the obtained composite false twisted yarns, those according to the present invention are FY-
Since there is a sufficient elongation difference between A and FY-B as in the past,
It had a core-sheath structure, was rich in swelling, and had a combed-like texture. On the other hand, in the composite false-twisted yarn according to Comparative Example 2, since there is no substantial difference in elongation between FY-A and FY-B, a core-sheath structure cannot be obtained, and thus a bulging feeling is obtained. It was far from a worsted look. For reference, Table 3 shows the elongations of FY-A and FY-B in Examples and Comparative Examples.

[0073]

[Table 3]

[0074]

EFFECTS OF THE INVENTION According to the present invention, due to the specific use of the oriented crystallization inhibitor, the different shrinkage mixed yarns, bulky yarns, and composite false-twisted yarns can be intermediate-oriented yarns at a higher speed. It will be possible to get as. In particular, when obtaining a stretched heterogeneous-shrink mixed yarn, the relaxation step is omitted, and since the multi-component mixed yarn that is composed of the intermediate oriented yarn is simply hot-drawn and heat-fixed, the productivity is improved. Improve further.

[Brief description of drawings]

FIG. 1 is a schematic front view of an apparatus for obtaining a heterogeneous shrinkage mixed fiber from a diversity mixed fiber of the present invention.

FIG. 2 is a schematic front view of another device for obtaining a different shrinkage mixed yarn from the diversity mixed yarn of the present invention.

FIG. 3 is a schematic front view of an apparatus for obtaining a composite false twist textured yarn from the diversity mixed yarn of the present invention.

[Explanation of symbols]

FY-A Polyester multifilament to which spontaneous elongation is imparted by heat drawing and heat setting FY-B Compared with FY-A, the elongation and natural draw ratio are small, but the polyester multifilament 1 has high boiling water shrinkage. 2 First take-up roll 3 Interlace nozzle 4 Second take-up roll 5 Non-contact heater 6 Winding package

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Sei Tanizawa 3-4-1 Mihara, Ibaraki City, Osaka Prefecture Teijin Limited Osaka Research Center (72) Inventor Kimihiro Ogawa 3-4-1 Mihara, Ibaraki City, Osaka Prefecture Teijin Limited Osaka Research Center (56) Reference JP-A-11-279879 (JP, A) JP-A-7-243144 (JP, A) JP-A-9-176920 (JP, A) JP-A-62-1 21833 (JP, A) JP 56-15425 (JP, A) JP 58-54035 (JP, A) JP 4-333628 (JP, A) JP 7-173720 (JP, A) JP-A-11-140737 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) D02G 1/00-3/48 D02J 1/00-13/00

Claims (11)

(57) [Claims] 1. A mixed filament yarn composed of two or more kinds of polyester multifilaments, both filaments being intermediate oriented yarns, wherein one filament (FY-A) contains an oriented crystal inhibitor. A multi-component mixed yarn having a lower boiling water shrinkage than the other filament (FY-B) but a high elongation or natural draw ratio. 2. The diversity mixed yarn according to claim 1, wherein the mixed yarn is a Co-spun yarn. 3. The diversity mixed fiber according to claim 1, wherein the mixed fiber is a spun alignment yarn. 4. The boiling water shrinkage of FY-B is in the range of 50 to 65%, and it is at least 5 more than that of FY-A.
%. The diversity mixed yarn according to any one of claims 1 to 3, which is large. 5. The elongation of FY-A is in the range of 200 to 370%, and is at least 50 more than that of FY-B.
%. The diversity mixed yarn according to any one of claims 1 to 4, which has a large percentage. 6. A method for producing a heterogeneous shrinkage mixed yarn having latent bulging characteristics, which comprises subjecting the diversity mixed yarn according to claim 1 to a heat drawing / heat setting treatment. 7. The heating conditions in the heat stretching / heat setting treatment are 75 to 120 ° C. and 0 . 3 to 0.7 seconds, and 10
In 0~120 ℃, 0. The method for producing a different shrinkage mixed fiber according to claim 6, which is in the range of 1 to 0.5 seconds. 8. The diversity mixed yarn according to claim 1,
A method for producing a bulky yarn, which comprises drawing at a draw ratio not higher than the natural draw ratio of A and at a draw ratio exceeding the natural draw ratio of FY-B, and then leaving the yarn in a relaxed state. 9. The method for producing a bulky yarn according to claim 8, wherein the draw ratio is in the range of 1.70 to 1.80 times. 10. A method for producing a composite false twisted yarn, which comprises subjecting the diversity mixed yarn according to claim 1 to simultaneous drawing false twisting. 11. The stretching ratio and the heat setting temperature of false twist are
The method for producing a composite false twisted yarn according to claim 10, which is in the range of 1.65 to 1.75 and 150 to 170 ° C, respectively.