JP2687513B2 - Manufacturing method of bulky fluff - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a method for producing a fluff yarn composed of a core / saya-type composite textured yarn having a high bulkiness, and more specifically, for men's pants or women's outerwear. The present invention relates to a method for producing a high-fluffed bulky yarn which is preferably used for soft-spun-like textured fabrics for applications and the like.

[Prior Art] Conventionally, many attempts have been made to achieve the bulkiness of a spun yarn with a fluff yarn of a multifilament yarn.

As one of the methods, there is a method of performing false twisting while rubbing a multifilament yarn with a blade, or a method of temporarily twisting with a roughened disk. But,
In this method, since the blade or the roughened surface disk wears over time, the yarn quality of the fluff gradually changes, and fuzz or uneven thickness is provided in the yarn longitudinal direction, so that the yarn streaks are not uniform, and the strength is high. However, there is a drawback that the variation rate is not constant in the yarn longitudinal direction and the variation rate is large.

Further, as another method, there is a method in which a multifilament yarn in which weak points or partial cuts are intermittently given along the longitudinal direction of the yarn is false twisted to generate fluff, and then entangled by an entanglement treatment. However, the fluff yarn obtained by this method has a relatively small number of fluffs, and among them, those having long fluff feet have the drawbacks that the fluff quality is poor and pilling is likely to occur.

As another known example, there is a method for producing a yarn from a film-like substance, as described in JP-B-43-14196. This is to make a film-shaped filamentary body slit in a narrow width frictionally run under heat tension and to fibrillate, but there is almost no entanglement of the fibrillated part,
It had the disadvantages of being peeled off, having low strength, and high fluctuation rate of strength.

[Problems to be Solved by the Invention] An object of the present invention is to solve the above-mentioned conventional drawbacks and to provide a soft bulkiness and a feeling of "tension", "waist", etc. The present invention provides a method for manufacturing the same.

[Means for Solving the Problems] In the method for producing a high-fluffy bulky yarn according to the present invention, which achieves the above object, two or more multifilament yarns are used and a fluid entanglement treatment is performed in advance by providing alignment or yarn feeding difference. After the composite temporary twisting process, the compound temporary twisting process is wound around the guide, and the yarns on the outward path toward the guide and the yarns on the return path are mixed with each other under tension, It is characterized in that twisting and handling are applied to give fluff, and then the yarn after the interlacing treatment is subjected to the fluid entanglement treatment again.

According to the above-mentioned manufacturing method, fluffs and loops are entangled on the surface of the core / sheath type composite temporary twisted yarn due to the entanglement of the crimped filaments of the core yarn and the sheath yarn, and the difference in the core / saya yarn length is 5%. It is possible to obtain the above-mentioned bulky high fluff yarn.

The fluff yarn may have a stretch recovery rate of 5% or more.

It is preferable that at least the core yarn is a drawn yarn and the sheath yarn is an incompletely drawn yarn. If the requirements for forming the bulky high fluff yarn are described in detail, first, the constituent material of the composite temporary twisted yarn is one that is generally commonly used, such as a drawn yarn of a thermoplastic synthetic fiber multifilament yarn such as polyester or nylon. 2500m / min ~ 8000m /
Incompletely drawn yarns, undrawn yarns, and the like, which have been spun in minutes. Particularly, the core yarn of the multifilament yarn is an ordinary drawn yarn, and the sheath yarn is
A combination with an incompletely drawn yarn called POY or a combination of POY and POY is the most preferable usage. It can take advantage of the characteristics of "tension" and "waist" and the softness of spanlike texture, and can be produced rationally.

As for the core yarn, filament yarns with a large denier of single fiber filaments or total single yarns or modified cross-section yarns, such as triangular, pentagonal, octagonal, Y-shaped filaments, are used for the "tension" and "waist" of the fabric. It is preferable from the standpoints of improving the feeling, increasing the tear strength, improving process passability, and the like. Specifically, it depends on the degree of entanglement of the composite yarn and the yarn type,
A single fiber filament denier of 2 denier or more and a total single yarn denier of 50 denier or more are preferred.

On the other hand, with respect to the sheath yarn, more than half of the fluff and loops of the feather yarn are constituted by this sheath yarn, and the denier of single filament is 3 denier or less, and the number of the filament yarn is at least 24 or more according to the present invention. This is a preferable method for maintaining the effect. Further, in order to further increase the glossiness, a thread having a deformed cross section is preferable, and a triangular flat shape, a pentagonal shape, a Y shape, etc. are particularly preferable. Conversely, to reduce the glossiness, TiO ₂ or Mg
A raw yarn containing 0.1% or more of O ₂ additive may be used.

Next, there is a difference in the yarn length between the core yarn and the sheath yarn, which is the ratio of the substantial yarn length of the core yarn and the sheath yarn included in an apparent single length of the fluff yarn, and Is a ratio of the length of the sheath yarn to the length of the sheath yarn, and is preferably 5% or more so that the sheath yarn is long. When the yarn length difference becomes large, the surface of the fluff yarn is covered with the fluff and loops of the sheath yarn, so that the effect of the bulky fluff yarn of the present invention can be remarkably expressed.

However, when the difference in yarn length becomes large and exceeds 50% or more, the degree of entanglement of the sheath yarn becomes weak, the entangled portion of the core yarn and the sheath yarn moves due to the squeeze, and a large nep is formed. It is not preferable because it may disturb the fabric surface.

Next, entanglement is given to the mutual entanglement of the core yarn and the sheath yarn, the whole sheath yarn is entangled with the core yarn, and the fluff, slack, and loops covering the surface of the sheath yarn cover the surface of the fluff yarn. Is forming. And the number of fluffs, slacks and loops is 50
% Or more, preferably 80% or more is projected from the sheath yarn, and the larger this ratio, the greater the soft spun-like effect of the present invention. On the other hand, when the number of fluffs of the core yarn increases, the yarn strength of the fluff yarn decreases and the yarn unevenness increases, and the process passability decreases, which is unpreferable and not preferable. The effect of the fluff yarn is remarkably exhibited by reducing the number of fluffs of the core yarn and maintaining the yarn strength and increasing the number of fluffs of the sheath yarn, and the core yarn and the sheath yarn are entangled with each other. This is very important.

The fluff yarn is a composite temporary twisted yarn, has a crimping property, and has an expansion and recovery ratio of 5% or more, preferably 10%.
~ 30% is more suitable. This crimp is provided in the core yarn and the sheath yarn, and the softness is further enhanced by the synergistic effect with the fluff and the slack.

FIG. 1 is a model diagram showing an example of the fluff yarn produced by the present invention.

In the figure, 1 is a core yarn, 2 is a sheath yarn, 3 is a fluff portion, 4
A slack portion and 5 indicate a loop portion, respectively.

Next, an example for producing the fluff yarn of the present invention will be described.

FIG. 2 is a process schematic diagram showing one example of a method for producing a fluff yarn according to the present invention.

The multifilament yarn Y ₁ and the multifilament yarn Y ₂ are supplied from the rollers 6 and 7, respectively, and pre-entangled by the air entanglement nozzle 8. Then, the temporary twist twister 11 and the temporary twist are provided between the feed roller 9 and the delivery roller 12. A heater 10 for heat setting of the heating element is provided to perform a composite temporary twisting process. The resulting composite temporary twisted yarn is further subjected to yarn-thread abrasion under high tension between the tension roller 14 and the delivery roller 12 to generate a fluff generation roller.
It is a process in which fluffing is performed via 13, post-entanglement processing is performed again between the entanglement roller 16 and the tension roller 14 by the air entanglement nozzle 15, and the cheese 17 is wound up. The process may be a series of processes, or the composite temporary twisting process and the fluffing process may be performed in two steps.

That is, as described above, the method for producing a bulky high fluff yarn of the present invention uses two or more multifilament yarns, which are subjected to fluid entanglement treatment in advance with alignment or yarn feeding difference, and after composite temporary twisting. The composite temporary twisting condition is wrapped around a guide, and the yarn on the outward path toward the guide and the yarn on the return path on the returning side are made to intersect with each other under tension, and the yarn is twisted and treated to give a fluff. It is characterized in that the yarn is applied and the yarn is subjected to the fluid entanglement treatment again. That is, the guide referred to here is a yarn guide for causing yarn-yarn rubbing, and a roller-shaped one or a normal yarn-guide-shaped one can be used as the fluff generating roller is expressed.

When the sheath yarn is a yarn having a monofilament filament strength lower than that of the core yarn, when the yarn-thread rubbing is performed,
The sheath yarn is easily fluffed, and the sheath yarn occupies more than half of the fluff.

Prior to the composite temporary twisting process, the fluid confounding that is given in advance is very important for forming the converging structure.However, by performing such a pre-entanglement process, the generation of nep and the fluffy foot due to the handling during the interlacing process. It is possible to prevent the yarn from becoming longer, to suppress the unevenness of the yarn strength, reduce the strength, and suppress the deterioration of the fluff quality.

Such a suppression effect can be further improved by performing the fluid entanglement process again after the interlacing process.

In the present invention, the interlacing process is performed between the yarns while the composite temporary twisting yarns are running, and the mutual yarns are constantly changed over time. Therefore, the yarn quality does not change due to the wear over time unlike the conventional blade.

This thread-thread interlacing process is performed under tension. By providing twisting and handling to the composite temporary twisted yarn by the crossing treatment under the tension, a part of the filament single yarn can be formed into fluff, slack, loop and the like. As the tension when giving this tension,
At least 0.5 g / d on the return side, on the outbound side
It is preferably 0.2 g / d or more.

In the present invention, the twist given by the crossing treatment is preferably at least 180 ° or more, more preferably 360 ° or more. By giving a twist of 180 ° or more in the interlacing process, more than half of the outer circumference of the yarn can be brought into frictional contact with the other yarn, thereby cutting the filament single yarn in the yarn longitudinal direction and between the yarns. Can be randomized. Therefore, the randomization of the cutting makes it possible to further uniform the thread streaks.

Example 1 100 denier 36 of fully drawn yarn polyester as core yarn
Align the filament yarn and the spinning speed of 3500 m / min, which becomes the sheath yarn, and the polyester 85 denier 24 filament yarn of incompletely drawn yarn, pre-entangle with a pressure of 3 kg / cm ² and give an overfeed rate of + 1% Temporary twisting is carried out at a temporary twisting number of 2500 T / m and a set temperature of 210 ° C, then 35 g on the outward side
It is wrapped around a high-tensile force of 120 g on the return path side through a fluff generation roller, and the thread on the outward path and the thread on the return path are crossed with each other to give a twist and handle of about 360 °, and then Entangling treatment was performed again with a 3 kg / cm ² entanglement nozzle to obtain a bulky high fluff yarn.

The obtained high lint yarn had a large number of fluffs, slacks, loops and the like on the surface, and the fluff of the sheath yarn accounted for 95% of the whole.

Further, the high-fluffy bulky yarn had a short fluff foot, and had less unevenness in the longitudinal direction of the yarn and uniformed streaks. The fluctuation rate of the strength was 7.3%, which was very small. The properties of the yarn (JIS method L-1073) were as follows.

Strength (g) 289 Elongation (%) 8.0 Boiling (%) 7.7 Fineness (D) 158.0 Stretch recovery (%) 16.2 Number of fluffs (co / 10 cm) 15 Yarn length difference (%) 21.0 Example 2 Incompletely drawn polyester 75 denier 9 as core yarn
The octagonal filament yarn and the fully blown fully drawn yarn of polyester 75 denier 72 filament round filament yarn are aligned and subjected to a pre-entanglement treatment of 3 kg / cm ² and the draw ratio
1.9 times, temporary twisting number of 2600 T / m, set temperature of 215 ° C. Temporary twisting during stretching is performed, and then it is wrapped around the fuzz generation roller under high tension of 32 g on the outbound side and 118 g on the inbound side, and then performed. The same fluffing as in Example 1 was performed.

The obtained high leek yarn had a large number of fluffs, and the fluff ratio of the sheath yarns was 98%. The fluctuation rate of the strength was 6.4%, which was very small. The results of measuring the yarn characteristics in the same manner as in Example 1 are as follows.

Strength (g) 475 Elongation (%) 17 Boiling (%) 8.2 Fineness (D) 176.0 Stretch recovery (%) 21.0 Number of fluff (co / 10cm) 65 Yarn length difference (%) 5.6 Example 1 1,500 T for each of the bulky wool yarns obtained in
/ m and 1200T / m are added and weaved to a Venetian texture with vertical and horizontal use, and the weight reduction rate of N treatment is 17% and 7%, respectively.
The dyeing and finishing process was carried out. As a result, a spun-like woven fabric having high bulkiness, soft bending, softness and warmth was obtained. The pilling and tensile strength were at a level with no particular problem.

[Effects of the Invention] In the present invention, the conventional braid is used in order to carry out the interlacing treatment between the yarns while the composite temporary twisting yarns are running, and to continuously change the mutual yarns with time. It does not cause a change in yarn quality due to wear over time like the one used.

By performing the pre-entanglement treatment, it is possible to prevent the generation of neps and the lengthening of the fluff foot due to the handling during the entanglement treatment, and to prevent the unevenness of the yarn strength from being averaged and the deterioration of the fluff quality to be suppressed. Will be able to. Such a suppression effect can be further improved by performing the fluid entanglement process again after the interlacing process.

Moreover, the obtained bulky high fluff yarn has the following excellent effects.

First, regarding the texture, fluff, slack, and loops cover the surface of the yarn, giving it a soft, spun-like touch, and because it has a difference in core / sheath yarn length, it does not feel "bulging" or dry. The "warmth" is increased.

Using thick denier or modified cross-section yarn for the core yarn improves the feeling of "tension" and "waist", and is suitable for outerwear applications.

Regarding gloss, when a triangular cross-section yarn or gloss yarn is used for the sheath yarn, it is possible to obtain a cloth having a silky-span-like appearance and having a silky-span-like touch even in the feeling and having drape and softness.

The fluff yarn is then crimpable, with a stretch of 3-10% in the fabric. Therefore, it is possible to obtain a comfortable fit in outerwear, particularly in applications such as slacks and skirts where bending and shrinkage are required.

By converting the sheath yarn into a fluff, the fluff etc. generally cause irregular reflection and are called "white blur" when dyeing.
Although the color developability deteriorates, the color developability improves because the incompletely drawn yarn is used as the sheath yarn. In addition, since it is heat-set by the composite temporary twisting process, it has high dye fastness and fastness.

In yarn processability, since the strength of the fluff yarn can be maintained by the strength of the core yarn, the strength is not significantly reduced as in the prior art, and the operation can be performed relatively stably.

[Brief description of the drawings]

FIG. 1 is a model diagram showing an example of fluff yarn obtained by the present invention. FIG. 2 is a process schematic diagram showing an example of a method for manufacturing a fluff yarn according to the present invention. 1: core yarn, 2: sheath yarn, 3: fluff portion, 4: slack portion, 5: loop, Y _1, Y _2: multifilament yarns, 6,7: feed roller, 8:
Air entanglement nozzle, 9: roller, 10: heater, 11: temporary twist twister, 12: delivery roller, 13: fluff generation roller, 1
4: Tension roller, 15: Air entanglement nozzle, 16: Entanglement roller, 1
7: cheese

Claims (1)

(57) [Claims] 1. A multi-filament yarn is used in which two or more multi-filament yarns are provided and subjected to a fluid entanglement process in advance by providing alignment or a yarn feeding difference, and after the composite temporary twisting process, the composite temporary twisting yarns are wound around a guide. , The thread on the outward path toward the guide and the thread on the return path on the return side are made to intersect with each other under tension, twist and handle are applied to the threads to give fluff, and then the thread after the interlacing treatment is re-fluidized. A method for producing a bulky high fluff yarn, which is characterized by performing entanglement treatment.