JP3083631B2 - Manufacturing method of composite processed 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 method for producing a composite textured yarn having a span-like texture.

[0002]

2. Description of the Related Art Conventionally, it has been known to produce a bulky processed yarn by blending two or more crimped yarns. For example, Japanese Patent Publication No. 60-9138 discloses a highly elastic crimped yarn. And a method of manufacturing a composite bulky yarn by using a low-stretch crimped yarn and performing a Taslan processing by increasing the yarn feeding speed of the crimped yarn having a lower stretchability by 5 to 30%. . However, in the case of this method, it is necessary to manufacture two types of crimped yarns having different elasticities in advance, so that the number of steps is increased and the steps are complicated.

[0003] In recent years, it has been developed to produce a bulky processed yarn in one step.
No. 13729 discloses that two yarns of the same brand are false-twisted under the same conditions with a two-stage heater type false twisting machine using adjacent weights, and are passed through a second heater in a state where they are aligned and combined. Describes a method for producing a drawn bulky false twisted yarn. However, the method described here imparts convergence and conjugation properties by simply aligning and heating two yarns that have been false twisted under the same conditions. In the processed yarn obtained by the above method, it is difficult to freely adjust the degree of the crimpability according to the use because the yarns constituting the processed yarn have the same crimpability.

In Japanese Patent Application Laid-Open No. 60-59137, a belt-type false twisting device having an intersecting structure is used, and from a plurality of multifilament yarns, a texture having a fine crimp is obtained regardless of the thickness of the yarn. Although it is disclosed that a yarn is produced, the method disclosed in the above publication is difficult to adjust the crimpability of each yarn, and lacks processing stability.

Further, Japanese Patent Application Laid-Open No. 62-117839 discloses a method of manufacturing a bulky composite yarn by combining false twisted yarn and strongly twisted yarn. But,
In this method, before doubling aligning pull the two yarn, there is a limitation that also advance both the yarn must be processed into a predetermined condition is satisfied. Therefore, it is necessary to prepare a special yarn in order to provide a difference in heat shrinkage or the like. In addition, in the case of this method, there is also a problem in that the twisting is caused in the longitudinal direction of the yarn due to the threading of the spinner or the like.

As described above, none of these methods can easily adjust the crimpability, so that they are not suitable for easily and stably producing a composite textured yarn having a span-like texture. .

[0007]

SUMMARY OF THE INVENTION An object of the present invention is to solve the problems in the prior art and to provide a method for producing a composite textured yarn having a span-like texture.

[0008]

SUMMARY OF THE INVENTION The present inventors have proposed that when two undrawn yarns are simultaneously drawn and false-twisted in adjacent weights, both yarns have different thermal aberrations and crimp differences ( In order to make the number of false twists different), the stretching ratio, the heater temperature, the number of disks of the false twisting device, the conditions of the twist direction are appropriately adjusted, and the yarn obtained by the false twisting is directly mixed and interlaced. As a result, it has been found that a composite processed yarn having excellent false twisting operability and having a span-like texture can be produced. That is, the method for producing a composite textured yarn according to the present invention comprises:
The undrawn yarns Y ₁ and Y ₂ are separated by weights adjacent to each other.
It is a draw false twisting process with different thermal aberrations and crimp differences, and directly mixed without winding, and one undrawn yarn Y
₁ is drawn in two stages, the temperature at the time of false twist of the undrawn yarn Y ₁ is set to the glass transition point or higher, and the temperature at the time of false twist of the undrawn yarn Y ₂ is set to the glass transition point or lower, and when the 1.25 times the draw ratio of the yarn Y _2, the draw ratio of the undrawn yarn Y ₁ is characterized in that it is a 1.625 to 1.82 times.

Further, the method for producing a composite textured yarn of the present invention
The undrawn yarns Y ₁ and Y ₂ are separated by weights adjacent to each other.
It is a draw false twisting process with different thermal aberrations and crimp differences, and directly mixed without winding, and one undrawn yarn Y
₁ is drawn in two stages, the temperature at the time of false twist of the undrawn yarn Y ₁ is set to the glass transition point or more, and the temperature at the time of false twist of the undrawn yarn Y ₂ is set to the glass transition point or more, and draw ratio of the yarn Y ₁ is at 1.625 to 1.82 times, and the undrawn yarn Y ₂
Is characterized by a draw ratio of 1.25 to 1.40 times, and by combining these, the heat yield and the crimp rate of both undrawn yarns may be different, and It is possible to change the texture in various ways.

First, FIG. 1 shows a specific example of a processing step in producing a spanning composite processed yarn by using the method of the present invention. In the processing step shown in FIG. 1, the undrawn yarn Y ₁
Is heated by a heater 3 via a first feed roller 1 and a second feed roller 2, and is subjected to false twisting in a false twisting device 4 in a heated state. In this case, the undrawn yarn Y ₁ can be drawn in two stages between the first feed roller 1 and the second feed roller 2 and between the second feed roller 2 and the delivery roller 5, and the drawing between the respective rollers is performed. The draw ratios are DR ₁ and DR ₂ , respectively, and the draw ratio of the entire undrawn yarn Y ₁ is DR.

On the other hand, the undrawn yarn Y ₂ is sent to the second feed roller 2 without being drawn, and the drawing ratio DR _{2 is applied} between the second feed roller 2 and the third feed roller 5.
It is only stretched. Moreover, the undrawn yarn Y ₂ side does not exist heaters 3 between the second feed roller 2 and the delivery rollers 5, the undrawn yarn Y ₂ is false twisting at room temperature by the temporary twisting device 4. Thereafter, the undrawn yarn Y subjected to false twisting
_After both ₁ and Y ₂ are picked up by the delivery roller 5, they are subjected to a fluid entanglement process in the interlacing device 6,
It is wound as winding cheese 7. In the present invention enables conjugation by undrawn yarn Y ₁ and Y ₂ are both processed into crimped yarn.

The undrawn yarns Y ₁ and Y ₂ suitable for the method of the present invention are polyester filament yarns and are not particularly limited as long as they have polyethylene terephthalate as a main constituent unit. Also, the degree of orientation of the undrawn yarns Y ₁ and Y ₂ may be within a range in which normal false twisting is possible, but in terms of operability, the birefringence is 15 × 1.
An undrawn yarn in the range of 0 ^{-3 to} 100 × 10 ^-3 is preferred. In addition, it is intended to be used for normal false twisting regard fineness of the undrawn yarn Y ₁ and Y _2. In particular, in the present invention, 2
The undrawn yarn Y ₁ is stretched in step, it is preferable to use a lower orientation than the undrawn yarn Y ₂ is drawn in one step, a false twisting is shown in Figure 1 in such a combination processing ( When the false twist temperature of the undrawn yarn Y ₂ is room temperature),
The remaining NetsuOsamuchi of the undrawn yarn Y ₂ is as it is, the one having a higher boiling shrinkage. In the present invention, the same undrawn yarn can be used.

In the present invention, the draw ratio (DR) is defined as DR ₁ × DR ₂ = based on the undrawn yarn Y ₁ having a high elongation.
[(E + 100) / 100] × 0.55 to 0.65 (where E indicates the breaking elongation of the undrawn yarn), and the preferable range of the draw ratio is about 1.54 to
It is 1.82 times.

In the present invention, as the false twisting device 4 for false twisting the undrawn yarns Y ₁ and Y ₂ , various types such as a spindle type, a friction type and an air nozzle type can be used. The friction method is preferable in that high-speed processing can be performed. If the false twisting device 4 of such a friction method can be easily adjusted state twisted by changing the number of discs, the undrawn yarn Y ₁ side of the false twisting device 4 and the undrawn yarn Y _{The two-} side false twist device 4 is generally composed of a different number of disks.

Further, in the present invention, the twist directions of the undrawn yarns Y ₁ and Y ₂ may be different from each other, and one may be s-twisted and the other may be z-twisted, and such a composite yarn is manufactured. case, by changing the twist direction of each false twisting device 4 for the undrawn yarn Y ₁ and Y _2, performs commingled. Thus s
By performing the twist-z twist composite processing, a non-torque yarn is obtained.

FIG. 2 shows a specific example of another processing step in producing a spanning composite processed yarn using the method of the present invention. In the processing step shown in FIG. Y
_{Both 1} and Y ₂ are heated by heater 3 respectively,
Thereafter, each of the false twist devices 4 performs false twist. At this time, the temperature at false twisting of the undrawn yarn Y ₁ and higher than the glass transition point, it is preferable that the temperature at false twisting of the undrawn yarn Y ₂ and below the glass transition point, in the present invention, each of the non The heater temperature for the drawn yarn is appropriately adjusted. However, in the present invention, by appropriately selecting the stretching ratio of the undrawn yarns Y ₁ and Y ₂ , even when the temperature at the time of false twisting of the undrawn yarn Y ₂ is equal to or higher than the glass transition point, an excellent span-like texture is obtained. Can be produced. Note that the composite textured yarn obtained by the present invention generally, a thing of the near silky tone texture when false twisting the undrawn yarn Y ₂ as shown in Figure 1 at room temperature, illustrated in FIG. 2 When false twisting is performed at a temperature equal to or higher than the glass transition point, the texture becomes close to wool. As described above, it is possible to produce a composite textured yarn having a different texture depending on whether the thermal aberration or the crimp difference is utilized.

The composite processed yarn produced by using the present invention has a boiling shrinkage of 30% or more and a difference in the crimp restoring rate of each yarn constituting the processed yarn of 10% or more. Preferably, such processed yarns have a particularly good spanning fabric hand. In the present invention,
Boiling shrinkage to 30% or more may be the temperature during false twisting of the undrawn yarn Y ₂ and below the glass transition point, other false twisting conditions of the undrawn yarn Y ₁ is generally (For example, the temperature at the time of false twisting is 160 ° C. or more, which is the lower limit temperature of the dam sum heater). Examples of producing the spanned composite textured yarn of the present invention will be described below, but the present invention is not limited thereto. In the following experiments, Teijin Seiki SDS-8 (improved type, spindle type) was used as a false twisting machine.

[0018]

【Example】

Example 1: The impact using undrawn yarn when changing the draw ratio DR of the undrawn yarn _{Y 1, 145 d / 24f,} 180% elongation, undrawn polyester multifilament birefringence 45 × 10 ^-3 Thread (Y ₁ ), 75d / 36f, elongation 120%, birefringence 5
Using a 5 × 10 ^-3 undrawn polyester multifilament yarn (Y ₂ ), processing is performed in the false twisting step (Y ₁ : heating false twisting with a combination draw, Y ₂ : room temperature false twisting) shown in FIG. the draw ratio of the undrawn yarn Y ₂ is fixed to 1.25 times, to obtain a composite textured yarn by changing the draw ratio of the undrawn yarn Y ₁ (experiment No.1 ~ 6). The false twist conditions at this time are shown in Table 1.
And as shown below. Yarn speed: 350 m / min. Speed ratio (D / Y): 2.012 Interlace overfeed: 7.5% Air pressure: 2.5 kg / cm ²

[0019]

[Table 1]

The composite twisted yarn obtained was evaluated for false twisting operability and texture of a tubular knitted fabric, and the results are shown in Table 1. From the experimental results, when the draw ratio of the undrawn yarn Y ₂ is 1.25 times, preferably the draw ratio of the undrawn yarn Y ₁ is 1.625～
It is 1.82 times. In this table, ○ indicates good operability or good texture, X indicates poor operability or poor texture, crimp restoration rate CR (%) and boiling shrinkage rate Sh.
The value of (%) is measured according to the following method.

[Measurement Method of Crimp Restoration Ratio CR] First, a skein of 10 turns is made while applying a tension of denier number × 0.1 g, and the skein is put into boiling water without load for 10 minutes. Is applied to the underwater load of the total denier number x 0.1 g and the underwater load of the total denier number x 2 mg to the underwater (water temperature 20 ± 2).
℃). Then, the length of the skein after 2 minutes is measured, and this length is defined as a (mm). Thereafter, only the heavier load was removed, and the length of the skein after 2 minutes was measured.
m). From the thus obtained a and b, the crimp restoration rate was calculated by the following equation. Crimp restoration rate CR (%) = (ab) / a × 100

[Measurement Method of Boiling Shrinkage Sh] First, a skein of 10 turns is made while applying a tension of denier number × 0.1 g, and this skein is subjected to an underwater load of total denier number × 0.1 g, and (Water temperature 20 ± 2 ° C). And 3
The length of the skein after minutes is measured, and this length is defined as L ₀ (mm).
Next, take out the skein from the water, remove the load, put it in boiling water without load for 30 minutes, apply a load of total denier number x 0.1 g again, hang it in water, and measure the length of the skein after 3 minutes. Measure and let this length be L ₁ (mm). From the thus obtained L ₀ and L ₁ , the boiling shrinkage was calculated by the following equation. Boiling shrinkage Sh (%) = (L ₀ −L ₁ ) / L ₀ × 1
00

The indication of the number of disks (for example, 1-10-1) in the table indicates that one guide disk (hard chrome plating) is used, ten urethane disks are used, and one guide disk is used. Indicates that

[0024] Example 2: not the heater temperature of the drawn yarn Y ₂ as affected undrawn yarn Y ₁ and Y ₂ when changing unused drawn yarn Y ₁ (same feed raw respectively described in Example 1 Using drawn yarn)
Performs processing in false twisting process shown in FIG. 1, the undrawn yarn Y ₂
Was changed (room temperature to 160 ° C.) to obtain a composite processed yarn (Experiment Nos. 7 to 15). At this time, the yarn speed, speed ratio, interlace overfeed, and air pressure were the same as in Example 1, and the false twisting conditions were as shown in Table 2. Table 2 also shows the evaluation results of the false twisting operability and the texture of the tubular knitted fabric in each experiment.

[0025]

[Table 2]

From the results of this experiment, under the conditions that the stretching ratio of the undrawn yarn Y ₁ is 1.80 and the stretching ratio of the undrawn yarn Y ₂ is 1.20, if the heater temperature of the undrawn yarn Y ₂ is 80 ° C. or more, It can be seen that the texture of the knitted fabric deteriorates. Experiment No. 15 shows that the number of disks of the false twisting device for each undrawn yarn also affects the false twisting operability and the texture of the tubular knitted fabric.

[0027] Example 3: as undrawn yarn Y ₁ and influence undrawn yarn Y ₁ and Y ₂ when both were heated in Y _2, using the undrawn yarn Y ₁ of the first embodiment described respectively (same feed Use undrawn yarn)
False twisting step (Y _1, Y ₂ both heaters heating) shown in FIG. 2 at performs processing, undrawn yarn undrawn yarn heater temperature of Y ₂ Y ₁ and the composite textured yarn in the same 180 ° C. (Experiment No .
16-20). At this time, the speed ratio, interlace overfeed, and air pressure are the same as in Example 1, but
The yarn speed was 300 m / min., And the conditions shown in Table 3 were used as false twisting conditions. Table 3 also shows the evaluation results of the false twisting operability and the texture of the tubular knitted fabric in each experiment.

[0028]

[Table 3]

[0029] From this experimental result, in the case of the experimental No.20 became fluff yarn by draw ratio of the undrawn yarn Y ₁ is too high.

[0030] Example 4: The impact undrawn yarn Y ₁ when changing to a draw ratio of the undrawn yarn Y ₁ and Y ₂ in the same, using the undrawn yarn Y ₁ of Example 1, Not 115 d / 36f, birefringence 5 as drawn yarn Y ₂
Using a 5 × 10 ⁻³ undrawn polyester multifilament yarn (Y ₂ ), a false twisting step (Y ₁ , Y ₂
And the undrawn yarns Y ₁ and Y _1
2 with the same draw ratio (Experiment Nos. 21 to 2)
6) got. At this time, the yarn speed, speed ratio, interlace overfeed, and air pressure were the same as in Example 3,
The false twist conditions are as shown in Table 4. Table 4 also shows the evaluation results of the false twisting operability and the texture of the tubular knitted fabric in each experiment.

[0031]

[Table 4]

In Table 4 above, in the case of Experiment No. 25, fluff was frequently generated, and in the case of Experiment No. 26, thread breakage occurred.

From the results of Examples 1 to 4, the number of urethane disks is smaller than the fineness D (denier) of the undrawn yarns Y ₁ and Y ₂ used and the number of urethane disks.
The relationship of (ウ D) / 2 holds, and if the number of urethane disks <(√D) / 2, the tension fluctuation in the false twist region increases, causing crimp spots.

[0034]

According to the method of the present invention, it is possible to produce a composite processed yarn having a spun tone without generation of fluff and without breakage of the yarn. It is possible to make it freely. It is also possible to perform s · z twist blending with different twist directions, and in this case, a non-torque yarn can be manufactured.

Furthermore, in the method of the present invention, even when the same undrawn yarn is used, the draw ratio, the heater temperature,
The number of false twists of each yarn can be changed by appropriately adjusting the number of disks in the false twisting device and the conditions of the twisting direction. By twisting, it is possible to produce a spanning composite processed yarn. In the present invention, by changing the combination of supply brands or changing the false-twisting conditions, it is possible to manufacture composite textured yarns having various textures, and to develop various applications. it can.

[Brief description of the drawings]

[1] no heater 3 is provided in the undrawn yarn Y ₂ side, by using a circumscribing spindle type friction texturing machine, illustrating an embodiment of the processing steps for manufacturing a composite yarn of the span adjustment of the present invention FIG.

FIG. 2 shows one of processing steps for producing a spanned composite processed yarn of the present invention using a circumscribed spindle-type friction false twisting machine in which a heater 3 is provided for both undrawn yarns Y ₁ and Y _2. It is a figure showing an aspect.

[Explanation of symbols]

Y ₁ , Y ₂ undrawn yarn 1 First feed roller 2 Second feed roller 3 Heater 4 False twisting device (disk) 5 Delivery roller 6 Interlace device 7 Winding cheese

──────────────────────────────────────────────────続 き Continuing on the front page (51) Int.Cl. ⁷ identification code FI D04B 1/16 D04B 1/16 (58) Investigated field (Int.Cl. ⁷ , DB name) D02G 3/04 D02G 1/02 D02G 1/18 D02J 1/00 D03D 15/00 D04B 1/16

Claims (2)

(57) [Claims] 1. A composite processed yarn in which _two undrawn yarns Y ₁ and Y ₂ are stretched and false-twisted by weights adjacent to each other with different thermal aberrations and crimp differences, and directly mixed without being wound once. a manufacturing method, in the above-described manufacturing method, is stretched in one of the undrawn yarn Y ₁ is two steps, the temperature at false twisting of the undrawn yarn Y ₁ and lower than the glass transition point, the undrawn yarn Y ₂ the temperature at false twisting be equal to or less than the glass transition point, and, when the draw ratio of the undrawn yarn Y ₂ and 1.25 times, the draw ratio of the undrawn yarn Y ₁ is 1.
A method for producing a composite textured yarn having a ratio of 625 to 1.82 times. 2. A composite processed yarn in which _two undrawn yarns Y ₁ and Y ₂ are drawn and false-twisted by weights adjacent to each other with different thermal aberrations and crimp differences, and are directly mixed without being wound once. a manufacturing method, in the above-described manufacturing method, is stretched in one of the undrawn yarn Y ₁ is two steps, the temperature at false twisting of the undrawn yarn Y ₁ and lower than the glass transition point, the undrawn yarn Y ₂ that the temperature at false twisting and the glass transition point or higher, and draw ratio of the undrawn yarn Y ₁ is at 1.625 to 1.82 times, and draw ratio of the undrawn yarn Y ₂ is 1.25 40. A method for producing a composite textured yarn, wherein the ratio is 40 times.